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Tian Z, Xu D, Yang S, Wang B, Zhang Z. Highly ordered nanocavity as photonic-plasmonic-polaritonic resonator for single molecule miRNA SERS detection. Biosens Bioelectron 2024; 254:116231. [PMID: 38513540 DOI: 10.1016/j.bios.2024.116231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/11/2024] [Accepted: 03/15/2024] [Indexed: 03/23/2024]
Abstract
Strong light-matter coupling between molecules and electromagnetic field lead to the formation of hybrid polaritonic states for surface enhanced Raman scattering (SERS) detection. However, owing to the inefficient interaction between zero-point fluctuations of photons/plasmons and molecular electronic transitions, the Raman enhancement is limited in relative low levels. Here, we propose and fabricate a TiOx/Cu2-xSe/R6G nanocavity based photonic-plasmonic-polaritonic resonator for single molecular SERS detection. Through precisely matching the energy levels of illuminated photon, generated plasmon, and molecular polariton, an extremely high Raman enhancement factor of 2.6 × 109 is implemented. The rationally designed SERS substrate allows sensitive detection of miRNA-21 in single molecular level with a detection limit of 1.58 aM. The hybrid SERS mechanism both from electromagnetic and chemical perspectives in this photonic-plasmonic-polaritonic resonance strategy provides insight into polaritonic semiconductor systems, thus paving the way for new experimental possibilities in light-matter hybrids.
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Affiliation(s)
- Zheng Tian
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Dawei Xu
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China
| | - Shenbo Yang
- Hongzhiwei Technology (Shanghai) CO.LTD., 1599 Xinjinqiao Road, Pudong, Shanghai, China
| | - Bing Wang
- Department of Oncological Surgery, Minhang Branch, Shanghai Cancer Center, Fudan University, Shanghai, 200240, China
| | - Zhonghai Zhang
- State Key Laboratory of Molecular & Process Engineering, Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200241, China; Institute of Eco-Chongming, East China Normal University, 20 Cuiniao Road, Chongming District, Shanghai, 202162, China.
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2
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Lu C, Wang X, Liu XY. Flexible Meso Electronics and Photonics Based on Cocoon Silk and Applications. ACS Biomater Sci Eng 2024; 10:2784-2804. [PMID: 38597279 DOI: 10.1021/acsbiomaterials.4c00254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Flexible electronics, applicable to enlarged health, AI big data medications, etc., have been one of the most important technologies of this century. Due to its particular mechanical properties, biocompatibility, and biodegradability, cocoon silk (or SF, silk fibroin) plays a key role in flexible electronics/photonics. The review begins with an examination of the hierarchical meso network structures of SF materials and introduces the concepts of meso reconstruction, meso doping, and meso hybridization based on the correlation between the structure and performance of silk materials. The SF meso functionalization was developed according to intermolecular nuclear templating. By implementation of the techniques of meso reconstruction and functionalization in the refolding of SF materials, extraordinary performance can be achieved. Relying on this strategy, particularly designed flexible electronic and photonic components can be developed. This review covers the latest ideas and technologies of meso flexible electronics and photonics based on SF materials/meso functionalization. As silk materials are biocompatible and human skin-friendly, SF meso flexible electronic/photonic components can be applied to wearable or implanted devices. These devices are applicable in human physiological signals and activities sensing/monitoring. In the case of human-machine interaction, the devices can be applicable in in-body information transmission, computation, and storage, with the potential for the combination of artificial intelligence and human intelligence.
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Affiliation(s)
- Changsheng Lu
- State Key Laboratory of Marine Environmental Science (MEL), College of Ocean and Earth Sciences, Xiamen University, Xiamen, Fujian 361102, P.R. China
| | - Xiao Wang
- State Key Laboratory of Marine Environmental Science (MEL), College of Ocean and Earth Sciences, Xiamen University, Xiamen, Fujian 361102, P.R. China
| | - Xiang Yang Liu
- State Key Laboratory of Marine Environmental Science (MEL), College of Ocean and Earth Sciences, Xiamen University, Xiamen, Fujian 361102, P.R. China
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Cao D, Hu M, Zhi D, Liang J, Tan Q, Lei Q, Li M, Cheng H, Wang L, Dai W. Systematic evaluation of machine learning-enhanced trifocal IOL power selection for axial myopia cataract patients. Comput Biol Med 2024; 173:108245. [PMID: 38531253 DOI: 10.1016/j.compbiomed.2024.108245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Revised: 03/03/2024] [Accepted: 03/04/2024] [Indexed: 03/28/2024]
Abstract
PURPOSE This study aimed to evaluate and optimize intraocular lens (IOL) power selection for cataract patients with high axial myopia receiving trifocal IOLs. DESIGN A multi-center, retrospective observational case series was conducted. Patients having an axial length ≥26 mm and undergoing cataract surgery with trifocal IOL implanted were studied. METHODS Preoperative biometric and postoperative outcome data from 139 eyes were collected to train and test various machine learning (ML) models (support vector machine, linear regression, and stacking regressor) using five-fold cross-validation. The models' performance was further validated externally using data from 48 eyes enrolled from other hospitals. Performance of seven IOL calculation formulas (BUII, Kane, EVO, K6, DGS, Holladay I, and SRK/T) were examined with and without ML models. RESULTS The results of cross-validation revealed improvements across all IOL calculation formulas, especially for K6 and Holladay I. The model increased the percentage of eyes with a prediction error (PE) within ±0.50 D from 71.94% to 79.14% for K6, and from 35.25% to 51.80% for Holladay I. In external validation involving 48 patients from other centers, six out of seven formulas demonstrated a reduction in the mean absolute error (MAE). K6's PE within ±0.50 D improved from 62.50% to 77.08%, and Holladay I from 16.67% to 58.33%. CONCLUSIONS In this study, we conducted a comprehensive evaluation of seven IOL power calculation formulas in high axial myopia cases and explored the effectiveness of the Stacking Regressor model in augmenting their accuracy. Of these formulas, K6 and Holladay I exhibited the most significant improvements, suggesting that integrating ML may have varying levels of effectiveness across different formulas but holds substantial promise in improving the predictability of IOL power calculations in patients with long eyes.
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Affiliation(s)
- Danmin Cao
- Aier Institute of Digital Ophthalmology & Visual Science, Changsha Aier Eye Hospital, Changsha, China; Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China; Aier Eye Hospital of Wuhan University, Wuhan, China
| | - Min Hu
- Aier Institute of Digital Ophthalmology & Visual Science, Changsha Aier Eye Hospital, Changsha, China; Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China
| | - Danlin Zhi
- The First Affiliated Hospital of University of South China, Hengyang, China
| | - Jianheng Liang
- Guangzhou Aier Eye Hospital, Jinan University, Guangzhou, China
| | - Qian Tan
- Aier Institute of Digital Ophthalmology & Visual Science, Changsha Aier Eye Hospital, Changsha, China
| | - Qiong Lei
- Aier Eye Hospital of Wuhan University, Wuhan, China
| | - Maoyan Li
- Aier Institute of Digital Ophthalmology & Visual Science, Changsha Aier Eye Hospital, Changsha, China
| | - Hao Cheng
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| | - Li Wang
- Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, TX, USA
| | - Weiwei Dai
- Aier Institute of Digital Ophthalmology & Visual Science, Changsha Aier Eye Hospital, Changsha, China.
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Goto S, Maeda N, Ohnuma K, Lawu T, Ogawa K, Sugiyama S, Matsumaru M, Noda T. Impact of segmented optical axial length on the performance of intraocular lens power calculation formulas. J Cataract Refract Surg 2024; 50:492-497. [PMID: 38237070 DOI: 10.1097/j.jcrs.0000000000001397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 01/08/2024] [Indexed: 04/24/2024]
Abstract
PURPOSE To investigate the difference between the segmented axial length (AL) and the composite AL on a swept-source optical coherence tomography biometer and to evaluate the subsequent effects on artificial intelligence intraocular lens (IOL) power calculations: the Kane and Hill-RBF 3.0 formulas compared with established vergence formulas. SETTING National Hospital Organization, Tokyo Medical Center, Japan. DESIGN Retrospective case series. METHODS Consecutive patients undergoing cataract surgery with a single-piece IOL were reviewed. The prediction accuracy of the Barrett Universal II, Haigis, Hill-RBF 3.0, Hoffer Q, Holladay 1, Kane, and SRK/T formulas based on 2 ALs were compared for each formula. The heteroscedastic test was used with the SD of prediction errors as the endpoint for formula performance. RESULTS The study included 145 eyes of 145 patients. The segmented AL (24.83 ± 1.89) was significantly shorter than the composite AL (24.88 ± 1.96, P < .001). Bland-Altman analysis revealed a negative proportional bias for the differences between the segmented AL and the composite AL. The SD values obtained by Hoffer Q, Holladay 1, and SRK/T formulas based on the segmented AL (0.52 diopters [D], 0.54 D, and 0.50 D, respectively) were significantly lower than those based on the composite AL (0.57 D, 0.60 D, and 0.52 D, respectively, P < .01). CONCLUSIONS The segmented ALs were longer in short eyes and shorter in long eyes than the composite ALs. The refractive accuracy can be improved in the Hoffer Q, Holladay 1, and SRK/T formulas by changing the composite ALs to the segmented ALs.
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Affiliation(s)
- So Goto
- From the Department of Ophthalmology, National Hospital Organization, Tokyo Medical Center, Meguro-ku, Tokyo, Japan (Goto, Ogawa, Sugiyama, Matsumaru, Noda); Department of Ophthalmology, Osaka University Graduate School of Medicine, Suita, Osaka, Japan (Goto, Maeda); Herbert Wertheim School Optometry and Vision Science, University of California, Berkeley, California (Goto); Laboratorio de Lente Verde, Sodegaura, Chiba, Japan (Ohnuma); VO, Toda, Saitama, Japan (Lawu)
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Alarcon A, Del Aguila Carrasco A, Gounou F, Weeber H, Cánovas C, Piers P. Optical and clinical simulated performance of a new refractive extended depth of focus intraocular lens. Eye (Lond) 2024; 38:4-8. [PMID: 38580743 PMCID: PMC11080621 DOI: 10.1038/s41433-024-03041-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/14/2024] [Accepted: 03/15/2024] [Indexed: 04/07/2024] Open
Abstract
OBJECTIVES The purpose of this study is to evaluate the optical and expected clinical performance of a new refractive Extended Depth of Focus (EDF) intraocular lens (IOL) designed to maintain a monofocal-like dysphotopsia profile. METHODS Simulated visual acuity (sVA) with varying defocus was calculated using the area under the Modulation Transfer Function measured in an average eye model and from computer simulations in eye models with corneal higher-order aberrations. Tolerance to defocus was evaluated using computer simulations of the uncorrected distance sVA under defocus. To evaluate the dysphotopsia profile, halo pictures obtained using an IOL-telescope, as well as simulated images in a realistic eye model under defocus were assessed. The results of the refractive EDF were compared to those of a diffractive EDF of the same platform. RESULTS The refractive EDF IOL provides similar range of vision to the diffractive EDF IOL with the same distance, and similar intermediate and near sVA. The refractive EDF IOL provides the same tolerance to hyperopia as the diffractive EDF but more tolerance to myopia. Halo pictures and simulations showed that the refractive EDF provides comparable dysphotopsia profile to the monofocal IOL and better than the diffractive EDF. CONCLUSIONS The results of this preclinical study in clinically relevant conditions show that the new refractive EDF IOL is expected to provide similar range of vision to the diffractive IOL of the same platform and higher tolerance to refractive errors. The refractive EDF provides a dysphotopsia profile that is better than the diffractive EDF and comparable to that of the monofocal IOL, also in the presence of residual refractive errors.
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Affiliation(s)
- Aixa Alarcon
- Johnson and Johnson Vision Van Swietenlaan 5, Groningen, 9728 NX, The Netherlands.
| | | | - Franck Gounou
- Johnson and Johnson Vision Van Swietenlaan 5, Groningen, 9728 NX, The Netherlands
| | - Henk Weeber
- Johnson and Johnson Vision Van Swietenlaan 5, Groningen, 9728 NX, The Netherlands
| | - Carmen Cánovas
- Johnson and Johnson Vision Van Swietenlaan 5, Groningen, 9728 NX, The Netherlands
| | - Patricia Piers
- Johnson and Johnson Vision Van Swietenlaan 5, Groningen, 9728 NX, The Netherlands
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Rangu N, Cooke DL, Mittal A, Reinhard T, Wacker K, Langenbucher A, Wendelstein JA, Riaz KM. Comparison of Pre- and Post-DMEK Keratometry and Total Keratometry Values for IOL Power Calculations in Eyes Undergoing Triple DMEK. Curr Eye Res 2024; 49:477-486. [PMID: 38251647 DOI: 10.1080/02713683.2024.2305780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 01/05/2024] [Indexed: 01/23/2024]
Abstract
PURPOSE To evaluate prediction accuracy of pre- and post-DMEK keratometry (K) and total keratometry (TK) values for IOL power calculations in Fuchs endothelial corneal dystrophy (FECD) eyes undergoing DMEK with cataract surgery (triple DMEK). METHODS Retrospective cross-sectional multicenter study of 55 FECD eyes (44 patients) that underwent triple DMEK between 2019 and 2022 between two centers in USA and Europe. Swept-source optical coherence tomography biometry (IOLMaster 700) was used for pre- and post-DMEK measurements. K and TK values were used for power calculations with ten formulae (Barrett Universal II (BUII), Castrop, Cooke K6, EVO 2.0, Haigis, Hoffer Q, Hoffer QST, Holladay I, Kane, and SRK/T). Mean error, mean absolute error (MAE), standard deviation, and percentage of eyes within ±0.50/±1.00 diopters (D) were calculated. Studied formulae were additionally adjusted using a method published previously (IOLup1D Method), which increases the IOL power by 1D. While both eyes from the same patient were considered for descriptive statistics, we restricted to one eye per individual (44 eyes for statistical comparisons. RESULTS MAEs for all formulae were lower for post-DMEK K and TK than pre-DMEK K and TK by an average of 0.24 and 0.47 D, respectively. The lowest MAE was 0.49 D for Kane using post-DMEK TK, and the highest MAE was 1.05 D for BUII using pre-DMEK TK. Most IOLup1D formulae had lower MAEs than pre-DMEK K and TK formulae. CONCLUSIONS The IOLup1D Method should be used instead of pre-DMEK K and TK values for triple DMEK in FECD eyes. Using post-DMEK TK values for cataract surgery after DMEK provides better refractive accuracy than any of the three studied methods used for triple DMEK procedures.
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Affiliation(s)
- Neal Rangu
- College of Medicine, University of Oklahoma, Oklahoma City, OK, USA
- Dean McGee Eye Institute, University of Oklahoma, Oklahoma City, OK, USA
| | | | - Aman Mittal
- Dean McGee Eye Institute, University of Oklahoma, Oklahoma City, OK, USA
| | - Thomas Reinhard
- Eye Center, Medical Center, University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Katrin Wacker
- Eye Center, Medical Center, University of Freiburg, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Achim Langenbucher
- Institute of Experimental Ophthalmology, Saarland University, Homburg, Germany
| | - Jascha A Wendelstein
- Institute of Experimental Ophthalmology, Saarland University, Homburg, Germany
- Department for Ophthalmology and Optometry, Kepler University Hospital, Linz, Austria
- Institut für Refraktive und Ophthalmo-Chirurgie (IROC), Zurich, Switzerland
| | - Kamran M Riaz
- Dean McGee Eye Institute, University of Oklahoma, Oklahoma City, OK, USA
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7
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Langenbucher A, Hoffmann P, Cayless A, Bolz M, Wendelstein J, Szentmáry N. Impact of uncertainties in biometric parameters on intraocular lens power formula predicted refraction using a Monte-Carlo simulation. Acta Ophthalmol 2024; 102:e285-e295. [PMID: 37350286 DOI: 10.1111/aos.15726] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/14/2023] [Accepted: 06/12/2023] [Indexed: 06/24/2023]
Abstract
PURPOSE The purpose of this study was to investigate the uncertainty in the formula predicted refractive outcome REFU after cataract surgery resulting from measurement uncertainties in modern optical biometers using literature data for within-subject standard deviation Sw. METHODS This Monte-Carlo simulation study used a large dataset containing 16 667 preoperative IOLMaster 700 biometric measurements. Based on literature Sw values, REFU was derived for both the Haigis and Castrop formulae using error propagation strategies. Using the Hoya Vivinex lens (IOL) as an example, REFU was calculated both with (WLT) and without (WoLT) consideration of IOL power labelling tolerances. RESULTS WoLT the median REFU was 0.10/0.12 dpt for the Haigis/Castrop formula, and WLT it was 0.13/0.15 dpt. WoLT REFU increased systematically for short eyes (or high power IOLs), and WLT this effect was even more pronounced because of increased labelling tolerances. WoLT the uncertainty in the measurement of the corneal front surface radius showed the largest contribution to REFU, especially in long eyes (and low power IOLs). WLT the IOL power uncertainty dominated in short eyes (or high power IOLs) and the uncertainty of the corneal front surface in long eyes (or low power IOLs). CONCLUSIONS Compared with published data on the formula prediction error of refractive outcome after cataract surgery, the uncertainty of biometric measures seems to contribute with ⅓ to ½ to the entire standard deviation. REFU systematically increases with IOL power and decreases with axial length.
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Affiliation(s)
- Achim Langenbucher
- Department of Experimental Ophthalmology, Saarland University, Homburg, Germany
| | - Peter Hoffmann
- Augen- und Laserklinik Castrop-Rauxel, Castrop-Rauxel, Germany
| | - Alan Cayless
- School of Physical Sciences, The Open University, Milton Keynes, UK
| | - Matthias Bolz
- Department of Ophthalmology, Johannes Kepler University Linz, Austria
| | - Jascha Wendelstein
- Department of Experimental Ophthalmology, Saarland University, Homburg, Germany
- Department of Ophthalmology, Johannes Kepler University Linz, Austria
| | - Nóra Szentmáry
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg, Germany
- Department of Ophthalmology, Semmelweis-University, Budapest, Hungary
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8
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Chen AJ, Long CP, Lu T, Garff KJ, Heichel CW. Accuracy of intraoperative aberrometry versus modern preoperative methods in post-myopic laser vision correction eyes undergoing cataract surgery with capsular tension ring placement. Graefes Arch Clin Exp Ophthalmol 2024; 262:1545-1552. [PMID: 38095689 PMCID: PMC11031443 DOI: 10.1007/s00417-023-06327-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 07/28/2023] [Accepted: 11/20/2023] [Indexed: 04/20/2024] Open
Abstract
PURPOSE To assess the accuracy of intraoperative wavefront aberrometry (IWA) versus modern intraocular lens formulas in post-myopic laser vision correction (LVC) patients undergoing cataract surgery with capsular tension ring placement. METHODS This is a retrospective chart review conducted at an academic outpatient center. All post-myopic LVC eyes undergoing cataract surgery with IWA from a single surgeon from 05/2017 to 12/2019 were included. All patients received a capsular tension ring (CTR). Mean numerical error (MNE), median numerical error (MedNE), and percentages of prediction error within 0.50D, 0.75D, and 1.00D were calculated for the above formulas. RESULTS Twenty-seven post-myopic LVC eyes from 18 patients were included. In post-myopic LVC, MNE with Optiwave Refractive Analysis (ORA), Barrett True K (BTK), Haigis, Haigis-L, Shammas, SRK/T, Hill-RBF v3.0, and W-K AL-adjusted Holladay 1 were + 0.224, - 0.094, + 0.193, - 0.231, - 0.372, + 1.013, + 0.860, and + 0.630 (F = 8.49, p < 0.001). MedNE were + 0.125, - 0.145, + 0.175, + 0.333, + 0.333, + 1.100, + 0.880, and + 0.765 (F = 7.89, p < 0.001), respectively. BTK provided improved accuracy in both MNE (p < 0.001) and MedNE (p = .033) when compared to ORA in pairwise analysis. If the ORA vs. BTK-suggested IOL power were routinely selected, 30% and 15% of eyes would have projected hyperopic outcomes, respectively (p = 0.09). CONCLUSIONS Our study suggests that in post-myopic LVC eyes undergoing cataract surgery with CTRs, BTK performed more accurately than ORA with regard to accuracy and yielded a lower percentage of eyes with hyperopic outcomes. Haigis, Haigis-L, and Shammas yielded similar results to ORA with regard to accuracy and percentage of eyes with hyperopic outcomes. On average, Shammas and Haigis-L suggested IOLs that would yield outcomes more myopic than expected when compared to BTK.
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Affiliation(s)
- Allison J Chen
- Shiley Eye Institute, Division of Cornea, Cataract and Refractive Surgery, Viterbi Family Department of Ophthalmology, UC San Diego, 9415 Campus Point Drive, MC0946, La Jolla, CA, 92093, USA
| | - Christopher P Long
- Shiley Eye Institute, Division of Cornea, Cataract and Refractive Surgery, Viterbi Family Department of Ophthalmology, UC San Diego, 9415 Campus Point Drive, MC0946, La Jolla, CA, 92093, USA
- USC Roski Eye Institute, Keck School of Medicine, Los Angeles, CA, USA
| | - Tianlun Lu
- Shiley Eye Institute, Division of Cornea, Cataract and Refractive Surgery, Viterbi Family Department of Ophthalmology, UC San Diego, 9415 Campus Point Drive, MC0946, La Jolla, CA, 92093, USA
| | - Kevin J Garff
- Shiley Eye Institute, Division of Cornea, Cataract and Refractive Surgery, Viterbi Family Department of Ophthalmology, UC San Diego, 9415 Campus Point Drive, MC0946, La Jolla, CA, 92093, USA
| | - Christopher W Heichel
- Shiley Eye Institute, Division of Cornea, Cataract and Refractive Surgery, Viterbi Family Department of Ophthalmology, UC San Diego, 9415 Campus Point Drive, MC0946, La Jolla, CA, 92093, USA.
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Bryan M, Butt JN, Ding Z, Tokranova N, Cady N, Piorek B, Meinhart C, Tice J, Miller BL. A Multiplex "Disposable Photonics" Biosensor Platform and Its Application to Antibody Profiling in Upper Respiratory Disease. ACS Sens 2024; 9:1799-1808. [PMID: 38549498 PMCID: PMC11059096 DOI: 10.1021/acssensors.3c02225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 02/08/2024] [Accepted: 03/18/2024] [Indexed: 05/02/2024]
Abstract
Photonic technologies promise to deliver quantitative, multiplex, and inexpensive medical diagnostic platforms by leveraging the highly scalable processes developed for the fabrication of semiconductor microchips. However, in practice, the affordability of these platforms is limited by complex and expensive sample handling and optical alignment. We previously reported the development of a disposable photonic assay that incorporates inexpensive plastic micropillar microfluidic cards for sample delivery. That system as developed was limited to singleplex assays due to its optical configuration. To enable multiplexing, we report a new approach addressing multiplex light I/O, in which the outputs of individual grating couplers on a photonic chip are mapped to fibers in a fiber bundle. As demonstrated in the context of detecting antibody responses to influenza and SARS-CoV-2 antigens in human serum and saliva, this enables multiplexing in an inexpensive, disposable, and compact format.
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Affiliation(s)
- Michael
R. Bryan
- Department
of Dermatology, University of Rochester, Rochester, New York 14627, United States
- Department
of Biochemistry and Biophysics, University
of Rochester, Rochester, New York 14627, United States
| | - Jordan N. Butt
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Zhong Ding
- ZDing
Tech, LLC, Pittsford, New York 14534, United States
| | - Natalya Tokranova
- Department
of Nanoscale Science & Engineering, University at Albany, Albany, New York 12203, United States
| | - Nathaniel Cady
- Department
of Nanoscale Science & Engineering, University at Albany, Albany, New York 12203, United States
| | - Brian Piorek
- University
of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Carl Meinhart
- University
of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Joshua Tice
- QuidelOrtho,
Inc., Rochester, New York 14626, United States
| | - Benjamin L. Miller
- Department
of Dermatology, University of Rochester, Rochester, New York 14627, United States
- Department
of Biochemistry and Biophysics, University
of Rochester, Rochester, New York 14627, United States
- The
Institute of Optics, University of Rochester, Rochester, New York 14627, United States
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10
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Guo S, Huang H, Li B, Huang M, Gao L, Chen J, Zeng Y, Yang Y, Liu L, Cheng L, Yao S, Cheng H. Comparatively analysing the postoperative optical performance of different intraocular lenses: a prospective observational study. BMC Ophthalmol 2024; 24:198. [PMID: 38671381 PMCID: PMC11046961 DOI: 10.1186/s12886-024-03439-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 04/09/2024] [Indexed: 04/28/2024] Open
Abstract
BACKGROUND Postoperative performance, including best corrected distance visual acuity (BCDVA) and optical metrics (from the OQAS and iTrace devices), was compared among 4 different intraocular lenses (IOLs). METHODS This prospective observational study included 104 eyes from 104 subjects who underwent cataract surgery combined with implantation of 4 different IOLs: monofocal (Mon) IOLs, segmental refractive (SegRef) IOLs, diffractive (Dif) IOLs and extended depth of focus (EDoF) IOLs. Postoperative BCDVA and optical metrics were collected at the 6th month. The OQAS optical metrics included the objective scattering index (OSI), Strehl ratio (SR), modulation transfer function (MTF) cut-off frequency, and predicted visual acuity (PVA); the iTrace optical metrics included blur/double vision, glare/halo, starburst, mixed focus, night myopia, and night hyperopia. RESULTS There was no significant difference in BCDVA among the 4 groups (P = 0.059; power = 70.3%). Differences were observed in all OQAS optical metrics among the groups (all P < 0.001). Overall, Mon IOLs and EDoF IOLs exhibited better performance than Dif IOLs and SegRef IOLs. Starburst was the only iTrace optical metric that differed among the groups (P < 0.001): SegRef IOLs caused more starbursts than Mon IOLs (P = 0.001), Dif IOLs (P = 0.006) and EDoF IOLs (P < 0.001). Spearman rank correlation analysis was used to determine the relationships among the iTrace optical metrics, OQAS optical metrics and BCDVA: starburst was negatively correlated with BCDVA, PVA at contrasts of 100% and 20%, OSI, and MTF cut-off frequency (all P ≤ 0.001); mixed focus was positively correlated with BCDVA, PVA at contrasts of 100% and 20%, OSI, and MTF cut-off frequency (all P ≤ 0.001). CONCLUSIONS Postoperative BCDVA and optical metrics varied among the different IOLs, which should be taken into account in the selection and management of IOLs for cataract patients. TRIAL REGISTRATION This study was approved by the First Affiliated Hospital of Guangzhou Medical University Ethical Review Board (No. 50 2022).
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Affiliation(s)
- Shuanglin Guo
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, #151, Yanjiang West Road, Yuexiu District, Guangzhou, Guangdong, 510120, China
| | - Hao Huang
- Department of Ophthalmology, Zhuzhou Hospital Affiliated to Xiangya School of Medicine, Central South University, #116, Changjiang South Road, Zhuzhou, Hunan, 412000, China.
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China.
| | - Bowen Li
- Eye Center of Xiangya Hospital, Hunan Key Laboratory of Ophthalmology, Central South University, Changsha, 410008, China
| | - Mansha Huang
- Department of Ophthalmology, Guangzhou Red Cross Hospital, Jinan University, Guangzhou, 510240, China
| | - Lu Gao
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, #151, Yanjiang West Road, Yuexiu District, Guangzhou, Guangdong, 510120, China
| | - Jingyi Chen
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, #151, Yanjiang West Road, Yuexiu District, Guangzhou, Guangdong, 510120, China
| | - Yuying Zeng
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, #151, Yanjiang West Road, Yuexiu District, Guangzhou, Guangdong, 510120, China
| | - Ye Yang
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, #151, Yanjiang West Road, Yuexiu District, Guangzhou, Guangdong, 510120, China
| | - Lin Liu
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, #151, Yanjiang West Road, Yuexiu District, Guangzhou, Guangdong, 510120, China
| | - Lu Cheng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
| | - Siyang Yao
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, #151, Yanjiang West Road, Yuexiu District, Guangzhou, Guangdong, 510120, China
| | - Hao Cheng
- Department of Ophthalmology, The First Affiliated Hospital of Guangzhou Medical University, #151, Yanjiang West Road, Yuexiu District, Guangzhou, Guangdong, 510120, China.
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Coutinho CP, Schiano-Lomoriello D, Mazzotta C, Ferrise M, Hoffer KJ, Ribeiro FJ, Dias JM, Savini G. Differences Between Simulated Keratometry and Total Corneal Power in Eyes With Keratoconus and a Formula to Improve IOL Power Calculation Results. J Refract Surg 2024; 40:e253-e259. [PMID: 38593262 DOI: 10.3928/1081597x-20240311-06] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
PURPOSE To compare simulated keratometry (SimK) and total corneal power (TCP) in keratoconic eyes, to determine whether the differences are systematic and predictable and to evaluate an adjusted TCP-based formula for intraocular lens (IOL) power calculation. METHODS In a consecutive series of keratoconic eyes, measurements of SimK, TCP, posterior keratometry, and anterior and posterior corneal asphericities (Q-values) were retrospectively collected. The difference between SimK and TCP was linearly correlated to the biometric parameters. In a separate sample of keratoconic eyes that had undergone cataract surgery, IOL power was calculated with the Barrett Universal II, Hoffer QST, Holladay 1, Kane, and SRK/T formulas using the SimK and an adjusted TCP power. The respective prediction errors were calculated. RESULTS A total of 382 keratoconic eyes (271 patients) were enrolled. An increasing overestimation of SimK by TCP was detected from stage I to III, with a significant correlation between the SimK and TCP difference and SimK in the whole sample (P < .0001, r2 = 0.1322). Approximately 7% of cases presented an underestimation of SimK by TCP. IOL power calculation with the adjusted TCP improved outcomes, achieving a maximum of 80% of eyes with a prediction error within ±0.50 diopters with the Hoffer QST, Holladay 1, and Kane formulas. CONCLUSIONS Overall, SimK overestimated TCP. Such a difference could not be predicted by any variable. The proposed TCP-adjustment formula (TCPadj = TCP + 0.56 diopters) in keratoconic eyes for IOL power calculation might be valuable for improving refractive outcomes. [J Refract Surg. 2024;40(4):e253-e259.].
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Camellin U, Ninotta I, Latino G, Alibrandi A, Aragona P, Roszkowska AM. Prediction of total corneal power in keratoconus using anterior surface data. Clin Exp Optom 2024; 107:274-280. [PMID: 37271161 DOI: 10.1080/08164622.2023.2215382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Revised: 05/09/2023] [Accepted: 05/12/2023] [Indexed: 06/06/2023] Open
Abstract
CLINICAL RELEVANCE Keratoconus results in an increase in anterior and posterior curvatures and a reduction in corneal thickness. Anterior corneal ectasia is partially compensated by remodelling the corneal epithelium. Therefore, there is an alteration in the relationship between corneal surfaces and variation in corneal power. The variation in corneal power is one of the sources that induces errors in IOL power calculation. BACKGROUND This study aimed to assess a method for predicting total corneal power in keratoconus using several anterior surface parameters at 3 mm and 4 mm. METHODS Tomographic data obtained using Pentacam (Oculus, Germany) were analysed from 280 eyes of 140 patients with keratoconus using anterior and posterior keratometry, anterior Q-value at 8 mm, central corneal thickness, Kmax location and value, and true net power at 4 mm (TNP). Calculated total corneal power (TCPc) at 3 mm was obtained using the Gauss formula. Predicted total corneal power at 3 mm (TCPp3) and 4 mm (TCPp4) was obtained from univariate (TCPp3u and TCPp4u) and multivariate linear regression formulae (TCPp3m and TCPp4m). SimK, anterior Q-value, vertical location, and Kmax value were used in the multivariate formulae. Mean absolute error (MAE) and median absolute error (MedAE) were also calculated. Absolute frequencies within dioptric ranges of all formulas divided for keratoconus grading were evaluated. RESULTS TCPc and TNP exhibited a good correlation (R2 = 0.58, p < 0.05) with a higher dispersion above 50 D of corneal power. Highly significant correlations were observed between TCPp3u and TCPc (R2 = 0.978, p < 0.05) and TCPp3m and TCPc (R2 = 0.989, p < 0.05). Lower but significant correlations were observed between TCPp4u and TNP (R2 = 0.692, p < 0.05) and between TCPp4m and TNP (R2 = 0.887, p < 0.05). The best results for TCP prediction at 3 and 4 mm were obtained with TCPp3m and TCPp4m as follows: MAE of TCPp3m was 0.24 ± 0.20 (SD) D with MedAE of 0.20 D, while MAE of TCPp4m was 0.96 ± 0.77 D with MedAE of 0.80 D. The 3 mm multivariate regression formula results in higher absolute frequencies of prediction errors in the total eyes within 0.5 D (93%) than the univariate formula (81%). At 4mm, the multivariate regression formula has a lower percentage within 0.5 D (32%) than the univariate formula (41%), but the percentage of the multivariate formula is higher within 1 D (63%) than the univariate formula (56%). CONCLUSION All formulas show a decrease in accuracy with increasing grades of keratoconus. Multivariate linear regression formulae using only anterior surface data can predict TCP with good approximation in eyes with keratoconus in cases where posterior surface parameters are unavailable. The vertical location of Kmax and the anterior asphericity could play a relevant role in the prediction of total corneal power in keratoconus.
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Affiliation(s)
- Umberto Camellin
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
| | - Ivan Ninotta
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
| | - Gianluigi Latino
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
| | | | - Pasquale Aragona
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
| | - Anna M Roszkowska
- Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, Messina, Italy
- Department of Ophthalmology, Andrzej Frycz Modrzewski Krakow University, Kraków, Poland
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Marques JH, Baptista PM, Ribeiro B, Menéres P, Beirão JM. Intraocular lens power calculation: angle κ and ocular biomechanics. J Cataract Refract Surg 2024; 50:345-351. [PMID: 37962186 DOI: 10.1097/j.jcrs.0000000000001362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 11/02/2023] [Indexed: 11/15/2023]
Abstract
PURPOSE To study the effect of ocular biomechanics on the prediction error of intraocular lens (IOL) power calculation. SETTING Centro Hospitalar Universitário do Porto, Porto, Portugal. DESIGN Prospective longitudinal study. METHODS This study included 67 subjects. Before cataract surgery subjects underwent biometry with IOLMaster 700 and biomechanical analysis with Corvis Scheimpflug technology. The targeted spherical equivalent was calculated with SRK-T and Barrett Universal II. Associations between prediction error (PE), absolute prediction error (AE), and biometric and biomechanical parameters were performed with stepwise multivariate linear correlation analysis. RESULTS Using the SRKT formula, there was association between PE and Corvis Biomechanical Index (CBI, B = -0.531, P = .011) and between AE and the horizontal offset between the center of the pupil and the visual axis (angle κ, B = -0.274, P = .007). Considering the Barret Universal II formula, PE was independently associated with anterior chamber depth ( B = -0.279, P = .021) and CBI ( B = -0.520, P = .013) and AE was associated with angle κ ( B = -0.370, P = .007). CONCLUSIONS A large angle κ may reduce the predictability of IOL power calculation. Ocular biomechanics likely influence the refractive outcomes after IOL implantation. This study showed that eyes with softer corneal biomechanics had more myopic PE. This may relate to anteriorization of the effective lens position. Dynamic measurements may be the way to progress into future formulas.
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Affiliation(s)
- João Heitor Marques
- From the Serviço de Oftalmologia, Centro Hospitalar Universitário do Porto, Porto, Portugal (Marques, Baptista, Ribeiro, Menéres, Beirão); Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal (Baptista, Menéres, Beirão)
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Lou W, Chen Z, Huang Y, Jin H. Improving Accuracy of In-The-Bag Intraocular Lens Power Calculation in Adult Eyes with Unilateral Subluxated Lenses by Using the Anterior Chamber Depth of the Unaffected Eye. Ophthalmic Res 2024; 67:248-256. [PMID: 38527448 DOI: 10.1159/000538234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 02/29/2024] [Indexed: 03/27/2024]
Abstract
INTRODUCTION This study aimed to determine the interchangeability of bilateral anterior chamber depth (ACD) in intraocular lens (IOL) power calculations for cataractous eyes and refractive outcomes using the unaffected fellow eye's ACD in subluxated crystalline lenses. METHODS The predicted postoperative spherical equivalent (SE) calculated using the Kane formula with and without fellow eye's ACD in 202 cataract patients was compared. Refractive outcomes of the newer formulas (the Kane, Barrett Universal II [BUII], and Pearl-DGS formulas) with affected eye's ACD and with unaffected fellow eye's ACD were compared in 33 eyes with lens subluxation (the affected eye) undergoing in-the-bag IOL implantation. The SD of the prediction error (PE) was assessed using the heteroscedastic method. RESULTS In 202 paired cataractous eyes, no marked ACD difference was found bilaterally; the predicted SE obtained without the fellow eye's ACD was comparable with that calculated with the fellow eye one (p = 0.90), with a mean absolute difference of 0.03 ± 0.03 D. With the affected eye AL, keratometry, and ACD, the median absolute error (MedAE) was 0.38-0.64 D, and the percentage of PE within ±0.50 D was 30.30-57.58%. The unaffected eye's ACD improved the results (MedAE, 0.35-0.49 D; the percentage of PE within ±0.50 D, 54.55-63.64%). The SDs of the BUII (0.82 D) and Pearl-DGS formulas (0.87 D) with the affected eye's ACD were significantly larger than those of the Kane and Pearl-DGS formulas (both 0.69 D) with the unaffected eye's ACD. CONCLUSION Bilateral ACD was interchangeable in IOL power calculation for cataractous eyes when using the Kane formula. Unaffected eye's ACD in lieu of affected eye's ACD can enhance the accuracy of newer formulas in patients with unilateral subluxated lenses undergoing in-the-bag IOL implantation.
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Affiliation(s)
- Wei Lou
- Department of Ophthalmology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China,
| | - Ziang Chen
- Department of Ophthalmology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yang Huang
- Department of Ophthalmology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Haiying Jin
- Department of Ophthalmology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai, China
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Xu J, Zhang L, Mo E, Zhu K, Zhu Y, Feng K, Wu Z, Zheng Y, Huang F, Gong X, Li J. The effect of corneal power on the accuracy of 14 IOL power formulas. BMC Ophthalmol 2024; 24:126. [PMID: 38504225 PMCID: PMC10949746 DOI: 10.1186/s12886-024-03395-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 03/14/2024] [Indexed: 03/21/2024] Open
Abstract
BACKGROUND This study evaluates the impact of corneal power on the accuracy of 14 newer intraocular lens (IOL) calculation formulas in cataract surgery. The aim is to assess how these formulas perform across different corneal curvature ranges, thereby guiding more precise IOL selection. METHODS In this retrospective case series, 336 eyes from 336 patients who underwent cataract surgery were studied. The cohort was divided into three groups according to preoperative corneal power. Key metrics analyzed included mean prediction error (PE), standard deviation of PE (SD), mean absolute prediction error (MAE), median absolute error (MedAE), and the percentage of eyes with PE within ± 0.25 D, 0.50 D, ± 0.75 D, ± 1.00 D and ± 2.00 D. RESULTS In the flat K group (Km < 43 D), VRF-G, Emmetropia Verifying Optical Version 2.0 (EVO2.0), Kane, and Hoffer QST demonstrated lower SDs (± 0.373D, ± 0.379D, ± 0.380D, ± 0.418D, respectively) compared to the VRF formula (all P < 0.05). EVO2.0 and K6 showed significantly different SDs compared to Barrett Universal II (BUII) (all P < 0.02). In the medium K group (43 D ≤ Km < 46 D), VRF-G, BUII, Karmona, K6, EVO2.0, Kane, and Pearl-DGS recorded lower MAEs (0.307D to 0.320D) than Olsen (OLCR) and Castrop (all P < 0.03), with RBF3.0 having the second lowest MAE (0.309D), significantly lower than VRF and Olsen (OLCR) (all P < 0.05). In the steep K group (Km ≥ 46D), RBF3.0, K6, and Kane achieved significantly lower MAEs (0.279D, 0.290D, 0.291D, respectively) than Castrop (all P < 0.001). CONCLUSIONS The study highlights the varying accuracy of newer IOL formulas based on corneal power. VRF-G, EVO2.0, Kane, K6, and Hoffer QST are highly accurate for flat corneas, while VRF-G, RBF3.0, BUII, Karmona, K6, EVO2.0, Kane, and Pearl-DGS are recommended for medium K corneas. In steep corneas, RBF3.0, K6, and Kane show superior performance.
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Affiliation(s)
- Jialin Xu
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Lu Zhang
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Er Mo
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital of Wenzhou Medical University Hangzhou Branch, 618 East Fengqi Road, Hangzhou, Zhejiang, 310000, China
| | - Kaiyi Zhu
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Yitong Zhu
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Ke Feng
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Zunting Wu
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Yangran Zheng
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Fang Huang
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China
| | - Xianhui Gong
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China.
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China.
| | - Jin Li
- National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, 325027, China.
- Eye Hospital, School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China.
- Wenzhou Medical University Eye Hospital, 270 West Xueyuan Road, Wenzhou, Zhejiang, 325027, China.
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Pifferi A, Miniati M, Farina A, Konugolu Venkata Sekar S, Lanka P, Dalla Mora A, Maffeis G, Taroni P. Initial non-invasive in vivo sensing of the lung using time domain diffuse optics. Sci Rep 2024; 14:6343. [PMID: 38491195 DOI: 10.1038/s41598-024-56862-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 03/12/2024] [Indexed: 03/18/2024] Open
Abstract
The in vivo diagnosis and monitoring of pulmonary disorders (caused for example by emphysema, Covid-19, immature lung tissue in infants) could be effectively supported by the non-invasive sensing of the lung through light. With this purpose, we investigated the feasibility of probing the lung by means of time-resolved diffuse optics, leveraging the increased depth (a few centimeters) attained by photons collected after prolonged propagation time (a few nanoseconds). We present an initial study that includes measurements performed on 5 healthy volunteers during a breathing protocol, using a time-resolved broadband diffuse optical spectroscopy system. Those measurements were carried out across the spectral range of 600-1100 nm at a source-detector distance of 3 cm, and at 820 nm over a longer distance (7-9 cm). The preliminary analysis of the in vivo data with a simplified homogeneous model revealed a maximum probing depth of 2.6-3.9 cm, suitable for reaching the lung. Furthermore, we observed variations in signal associated with respiration, particularly evident at long photon propagation times. However, challenges stemming from both intra- and inter-subject variability, along with inconsistencies potentially arising from conflicting scattering and absorption effects on the collected signal, hindered a clear interpretation. Aspects that require further investigation for a more comprehensive understanding are outlined.
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Affiliation(s)
- Antonio Pifferi
- Dipartimento di Fisica, Politecnico di Milano, 20133, Milan, Italy
- IFN-CNR, Consiglio Nazionale delle Ricerche, Istituto di Fotonica e Nanotecnologie, 20133, Milan, Italy
| | - Massimo Miniati
- Department of Experimental and Clinical Medicine, University of Florence, 50134, Florence, Italy
| | - Andrea Farina
- IFN-CNR, Consiglio Nazionale delle Ricerche, Istituto di Fotonica e Nanotecnologie, 20133, Milan, Italy
| | | | - Pranav Lanka
- Biophotonics@Tyndall, IPIC, Tyndall National Institute, Cork, T12R5CP, Ireland
| | | | - Giulia Maffeis
- Dipartimento di Fisica, Politecnico di Milano, 20133, Milan, Italy.
| | - Paola Taroni
- Dipartimento di Fisica, Politecnico di Milano, 20133, Milan, Italy
- IFN-CNR, Consiglio Nazionale delle Ricerche, Istituto di Fotonica e Nanotecnologie, 20133, Milan, Italy
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Kozhaya K, Kenny PI, Wang L, Weikert MP, Koch DD. Reply : Efficacy of segmented axial length and artificial intelligence approaches to intraocular lens power calculation in short eyes. J Cataract Refract Surg 2024; 50:313-314. [PMID: 38237066 PMCID: PMC10878438 DOI: 10.1097/j.jcrs.0000000000001400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Affiliation(s)
- Karim Kozhaya
- From the Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas
| | - Peter I. Kenny
- From the Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas
| | - Li Wang
- From the Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas
| | - Mitchell P. Weikert
- From the Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas
| | - Douglas D. Koch
- From the Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas
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Zollet P, Romeo MA, Tripepi D, Vinciguerra P, Vinciguerra R. Camellin-Calossi Formula for Intraocular Lens Power Calculation in Patients With Previous Myopic Laser Vision Correction. J Refract Surg 2024; 40:e156-e163. [PMID: 38466761 DOI: 10.3928/1081597x-20240208-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
PURPOSE To assess the performance of the Camellin-Calossi formula in eyes with prior myopic laser vision correction. METHODS This was a retrospective case series. Patients included had a history of uncomplicated myopic laser vision correction and cataract surgery. The primary outcome measures were cumulative distribution of absolute refractive prediction error, absolute refractive prediction error, and refractive prediction error. These parameters were estimated post-hoc using the Camellin-Calossi, Shammas, Haigis-L, Barrett True-K with or without history, Masket, and Modified Masket formulas and their averages starting from biometric data, clinical records, postoperative refraction, and intraocular lens power implanted. RESULTS Seventy-seven eyes from 77 patients were included. The Camellin-Calossi, Shammas, Haigis-L, Barrett True-K No History, Masket, Modified Masket, and Barrett True-K formulas showed a median absolute refractive error (interquartile range) of 0.25 (0.53), 0.51 (0.56), 0.44 (0.65), 0.45 (0.59), 0.40 (0.61), 0.60 (0.70), and 0.55 (0.76), respectively. The proportion of eyes with an absolute refractive error of ±0.25, 0.50, 0.75, 1.00, 1.50, and 2.00 diopters (D) for the Camellin-Calossi formula was 54.5%, 72.7%, 85.7%, 92.2%, 98.7%, and 100%, respectively. The cumulative distribution of the Camellin-Calossi formula showed the best qualitative performances when compared to the others. A statistically significant difference was identified with all of the others except the Haigis-L using a threshold of 0.25, with the Shammas, Modified Masket, and Barrett True-K at a threshold of 0.50 D and the Barrett True-K and Modified Masket at a threshold of 1.00 D. CONCLUSIONS The Camellin-Calossi formula is a valid option for intraocular lens power calculation in eyes with prior myopic laser vision correction. [J Refract Surg. 2024;40(3):e156-e163.].
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Langenbucher A, Hoffmann P, Cayless A, Wendelstein J, Szentmáry N. Limitations of constant optimization with disclosed intraocular lens power formulae. J Cataract Refract Surg 2024; 50:201-208. [PMID: 37847110 PMCID: PMC10878441 DOI: 10.1097/j.jcrs.0000000000001337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 09/15/2023] [Accepted: 10/05/2023] [Indexed: 10/18/2023]
Abstract
PURPOSE To investigate the effect of formula constants on predicted refraction and limitations of constant optimization for classical and modern intraocular lens (IOL) power calculation formulae. SETTING Tertiary care center. DESIGN Retrospective single-center consecutive case series. METHODS This analysis is based on a dataset of 888 eyes before and after cataract surgery with IOL implantation (Hoya Vivinex). Spherical equivalent refraction predSEQ was predicted using IOLMaster 700 data, IOL power, and formula constants from IOLCon ( https://iolcon.org ). The formula prediction error (PE) was derived as predSEQ minus achieved spherical equivalent refraction for the SRKT, Hoffer Q, Holladay, Haigis, and Castrop formulae. The gradient of predSEQ (gradSEQ) as a measure for the effect of the constants on refraction was calculated and used for constant optimization. RESULTS Using initial formula constants, the mean PE was -0.1782 ± 0.4450, -0.1814 ± 0.4159, -0.1702 ± 0.4207, -0.1211 ± 0.3740, and -0.1912 ± 0.3449 diopters (D) for the SRKT, Hoffer Q, Holladay, Haigis, and Castrop formulas, respectively. gradSEQ for all formula constants (except gradSEQ for the Castrop R) decay with axial length because of interaction with the effective lens position (ELP). Constant optimization for a zero mean PE (SD: 0.4410, 0.4307, 0.4272, 0.3742, 0.3436 D) results in a change in the PE trend over axial length in all formulae where the constant acts directly on the ELP. CONCLUSIONS With IOL power calculation formulae where the constant(s) act directly on the ELP, a change in constant(s) always changes the trend of the PE according to gradSEQ. Formulae where at least 1 constant does not act on the ELP have more flexibility to zero the mean or median PE without coupling with a PE trend error over axial length.
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Affiliation(s)
- Achim Langenbucher
- From the Department of Experimental Ophthalmology, Saarland University, Homburg/Saar, Germany (Langenbucher, Wendelstein); Augen- und Laserklinik Castrop-Rauxel, Castrop-Rauxel, Germany (Hoffmann); School of Physical Sciences, The Open University, Milton Keynes, United Kingdom (Cayless); Department of Ophthalmology, Johannes Kepler University Linz, Linz, Austria (Wendelstein); Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany (Szentmáry); Department of Ophthalmology, Semmelweis-University, Budapest, Hungary (Szentmáry)
| | - Peter Hoffmann
- From the Department of Experimental Ophthalmology, Saarland University, Homburg/Saar, Germany (Langenbucher, Wendelstein); Augen- und Laserklinik Castrop-Rauxel, Castrop-Rauxel, Germany (Hoffmann); School of Physical Sciences, The Open University, Milton Keynes, United Kingdom (Cayless); Department of Ophthalmology, Johannes Kepler University Linz, Linz, Austria (Wendelstein); Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany (Szentmáry); Department of Ophthalmology, Semmelweis-University, Budapest, Hungary (Szentmáry)
| | - Alan Cayless
- From the Department of Experimental Ophthalmology, Saarland University, Homburg/Saar, Germany (Langenbucher, Wendelstein); Augen- und Laserklinik Castrop-Rauxel, Castrop-Rauxel, Germany (Hoffmann); School of Physical Sciences, The Open University, Milton Keynes, United Kingdom (Cayless); Department of Ophthalmology, Johannes Kepler University Linz, Linz, Austria (Wendelstein); Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany (Szentmáry); Department of Ophthalmology, Semmelweis-University, Budapest, Hungary (Szentmáry)
| | - Jascha Wendelstein
- From the Department of Experimental Ophthalmology, Saarland University, Homburg/Saar, Germany (Langenbucher, Wendelstein); Augen- und Laserklinik Castrop-Rauxel, Castrop-Rauxel, Germany (Hoffmann); School of Physical Sciences, The Open University, Milton Keynes, United Kingdom (Cayless); Department of Ophthalmology, Johannes Kepler University Linz, Linz, Austria (Wendelstein); Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany (Szentmáry); Department of Ophthalmology, Semmelweis-University, Budapest, Hungary (Szentmáry)
| | - Nóra Szentmáry
- From the Department of Experimental Ophthalmology, Saarland University, Homburg/Saar, Germany (Langenbucher, Wendelstein); Augen- und Laserklinik Castrop-Rauxel, Castrop-Rauxel, Germany (Hoffmann); School of Physical Sciences, The Open University, Milton Keynes, United Kingdom (Cayless); Department of Ophthalmology, Johannes Kepler University Linz, Linz, Austria (Wendelstein); Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany (Szentmáry); Department of Ophthalmology, Semmelweis-University, Budapest, Hungary (Szentmáry)
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Heitkotter H, Allphin MT, Untaroiu A, Min H, Warr E, Wynne N, Cooper RF, Carroll J. Peak Cone Density Predicted from Outer Segment Length Measured on Optical Coherence Tomography. Curr Eye Res 2024; 49:314-324. [PMID: 38146597 PMCID: PMC10922793 DOI: 10.1080/02713683.2023.2289853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 11/27/2023] [Indexed: 12/27/2023]
Abstract
PURPOSE To compare peak cone density predicted from outer segment length measured on optical coherence tomography with direct measures of peak cone density from adaptive optics scanning light ophthalmoscopy. METHODS Data from 42 healthy participants with direct peak cone density measures and optical coherence tomography line scans available were used in this study. Longitudinal reflectivity profiles were analyzed using two methods of identifying the boundaries of the ellipsoid and interdigitation zones to estimate maximum outer segment length: peak-to-peak and the slope method. These maximum outer segment length values were then used to predict peak cone density using a previously described geometrical model. A comparison between predicted and direct peak cone density measures was then performed. RESULTS The mean bias between observers for estimating maximum outer segment length across methods was less than 2 µm. Cone density predicted from the peak-to-peak method against direct cone density measures showed a mean bias of 6,812 cones/mm2 with 50% of participants displaying a 10% difference or less between predicted and direct cone density values. Cone density derived from the slope method showed a mean bias of -17,929 cones/mm2 relative to direct cone density measures, with only 41% of participants demonstrating less than a 10% difference between direct and predicted cone density values. CONCLUSION Predicted foveal cone density derived from peak-to-peak outer segment length measurements using commercial optical coherence tomography show modest agreement with direct measures of peak cone density from adaptive optics scanning light ophthalmoscopy. The methods used here are imperfect predictors of cone density, however, further exploration of this relationship could reveal a clinically relevant marker of cone structure.
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Affiliation(s)
- Heather Heitkotter
- Department of Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, USA
| | - Mitchell T. Allphin
- Department of Ophthalmology & Visual Sciences, Medical College of Wisconsin, Milwaukee, USA
| | - Ana Untaroiu
- School of Medicine, Medical College of Wisconsin, Milwaukee, USA
| | - Heun Min
- School of Medicine, Medical College of Wisconsin, Milwaukee, USA
| | - Emma Warr
- Department of Ophthalmology & Visual Sciences, Medical College of Wisconsin, Milwaukee, USA
| | - Niamh Wynne
- Scheie Eye Institute, University of Pennsylvania, Philadelphia, PA, USA
| | - Robert F. Cooper
- Department of Ophthalmology & Visual Sciences, Medical College of Wisconsin, Milwaukee, USA
- Joint Department of Biomedical Engineering Marquette University and Medical College of Wisconsin, Milwaukee, USA
| | - Joseph Carroll
- Department of Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, USA
- Department of Ophthalmology & Visual Sciences, Medical College of Wisconsin, Milwaukee, USA
- Joint Department of Biomedical Engineering Marquette University and Medical College of Wisconsin, Milwaukee, USA
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Oh R, Hyon JY, Jeon HS. Accuracy of the PEARL-DGS Formula for Intraocular Lens Power Calculation in Post-Myopic Laser Refractive Corneal Surgery Eyes. Am J Ophthalmol 2024; 259:79-87. [PMID: 37914063 DOI: 10.1016/j.ajo.2023.10.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 09/05/2023] [Accepted: 10/25/2023] [Indexed: 11/03/2023]
Abstract
PURPOSE To investigate the accuracy of the PEARL-DGS formula for intraocular lens (IOL) power calculation in post-myopic laser refractive corneal surgery eyes. DESIGN Retrospective case series. METHODS A total of 139 eyes of 139 patients (mean axial length: 27.4 ± 2.1 mm) who had prior myopic laser refractive corneal surgery and subsequent cataract surgery using Tecnis ZCB00 from March 2018 to February 2023 were included. Refractive outcomes of 5 formulas (Barrett True K, Haigis-L, Hoffer-QST, PEARL-DGS, and Shammas-PL) were evaluated. Prediction error was defined as the difference between the measured and predicted postoperative refractive spherical equivalent using the IOL power actually implanted. Mean prediction error (MPE), median absolute prediction error (MedAE), and mean absolute prediction error were calculated. RESULTS Without constant optimization, the PEARL-DGS resulted in a MPE of +0.05 ± 0.65 diopters (D), whereas the other formulas resulted in myopic shifts. The MedAEs of the formulas were 0.39, 0.53, 0.65, 0.85, and 1.11 D for the PEARL-DGS, Hoffer-QST, Barrett True K, Shammas-PL, and Haigis-L, respectively, in order of magnitude (P < .05). With constant optimization, there were no statistically significant differences in the MedAEs among the 5 formulas (P = .388). CONCLUSIONS In comparison to other IOL formulas, the PEARL-DGS resulted in better refractive outcomes after cataract surgery in post-myopic laser refractive corneal surgery eyes without constant optimization. We suggest that PEARL-DGS be considered as the first choice for IOL power calculation in these eyes when the clinicians do not have their optimized constants.
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Affiliation(s)
- Richul Oh
- From the Department of Ophthalmology (R.O., J.Y.H., H.S.J.), Seoul National University College of Medicine, Seoul, Korea; Department of Ophthalmology (R.O.), Seoul National University Hospital, Seoul, Korea
| | - Joon Young Hyon
- From the Department of Ophthalmology (R.O., J.Y.H., H.S.J.), Seoul National University College of Medicine, Seoul, Korea; Department of Ophthalmology (J.Y.H., H.S.J.), Seoul National University Bundang Hospital, Seongnam, Korea
| | - Hyun Sun Jeon
- From the Department of Ophthalmology (R.O., J.Y.H., H.S.J.), Seoul National University College of Medicine, Seoul, Korea; Department of Ophthalmology (J.Y.H., H.S.J.), Seoul National University Bundang Hospital, Seongnam, Korea.
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Pozzi P, Balan V, Candeo A, Brix A, Pistocchi AS, D’Andrea C, Valentini G, Bassi A. Full-aperture extended-depth oblique plane microscopy through dynamic remote focusing. J Biomed Opt 2024; 29:036502. [PMID: 38515831 PMCID: PMC10956707 DOI: 10.1117/1.jbo.29.3.036502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/02/2024] [Accepted: 03/06/2024] [Indexed: 03/23/2024]
Abstract
Significance The reprojection setup typical of oblique plane microscopy (OPM) limits the effective aperture of the imaging system, and therefore its efficiency and resolution. Large aperture system is only possible through the use of custom specialized optics. A full-aperture OPM made with off the shelf components would both improve the performance of the method and encourage its widespread adoption. Aim To prove the feasibility of an OPM without a conventional reprojection setup, retaining the full aperture of the primary objective employed. Approach A deformable lens based remote focusing setup synchronized with the rolling shutter of a complementary metal-oxide semiconductor detector is used instead of a traditional reprojection system. Results The system was tested on microbeads, prepared slides, and zebrafish embryos. Resolution and pixel throughput were superior to conventional OPM with cropped apertures, and comparable with OPM implementations with custom made optical components. Conclusions An easily reproducible approach to OPM imaging is presented, eliminating the conventional reprojection setup and exploiting the full aperture of the employed objective.
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Affiliation(s)
- Paolo Pozzi
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
| | - Vipin Balan
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
| | - Alessia Candeo
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
| | - Alessia Brix
- Università degli Studi di Milano, Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Milano, Italy
| | - Anna Silvia Pistocchi
- Università degli Studi di Milano, Dipartimento di Biotecnologie Mediche e Medicina Traslazionale, Milano, Italy
| | - Cosimo D’Andrea
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
| | | | - Andrea Bassi
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
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Danjo Y. Calculation of the total corneal astigmatism using the virtual cross cylinder method on the secondary principal plane of the cornea. Sci Rep 2024; 14:4611. [PMID: 38409314 DOI: 10.1038/s41598-024-55154-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 02/20/2024] [Indexed: 02/28/2024] Open
Abstract
This study aimed to establish a virtual cross cylinder method to calculate the total corneal astigmatism by combining the anterior and posterior corneal astigmatism on the secondary principal plane of the cornea based on Gaussian optics. The meridian with the least refractive power, namely, the flattest meridian of the virtual cross cylinder of a ± 0.5 × C diopter, is set as the reference meridian, and the power (F) at an angle of φ between an arbitrary meridian and the reference meridian is defined as F(φ) = - 0.5 × C × cos2φ. The magnitude and axis of the total corneal astigmatism were calculated by applying trigonometric functions and the atan2 function based on the combination of the virtual cross cylinders of the anterior corneal astigmatism and the posterior corneal astigmatism. To verify the performance of the virtual cross cylinder method, a verification experiment with two Jackson cross cylinders and a lensmeter was performed, and the measured and calculated values were compared. The limit of the natural domain of the arctangent function is circumvented by using the atan2 function. The magnitude and axis of the total corneal astigmatism are determined through generalized mathematical expressions. The verification experiment results showed good agreement between the measured and calculated values. Compared to the vector analysis method, the virtual cross cylinder method is mathematically sound and straightforward. A novel technique for calculating total corneal astigmatism, the virtual cross cylinder method, was developed and verified.
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Affiliation(s)
- Yukitaka Danjo
- Department of Ophthalmology, Osaka Minato Central Hospital, Japan Community Health care Organization (JCHO), 1-7-1 Isoji, Minato-Ku, Osaka, 552-0003, Japan.
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Kim J, Park J, Jo Y. Comparison of the formula accuracy for calculating multifocal intraocular lens power: a single center retrospective study in Korean patients. Sci Rep 2024; 14:4462. [PMID: 38396107 PMCID: PMC10891126 DOI: 10.1038/s41598-024-54889-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 02/18/2024] [Indexed: 02/25/2024] Open
Abstract
This study evaluated the accuracy of newer formulas (Barrett Universal II, EVO 2.0, Kane, Hoffer QST, and PEARL-DGS) and the Haigis formula in Korean patients with the Alcon TFNT multifocal intraocular lens. In total, 3100 randomly selected eyes of 3100 patients were retrospectively reviewed. After constant optimization, the standard deviation (SD) of the prediction error was assessed for the entire group, and the root mean square error was compared for short and long axial length (AL) subgroup analysis. The Cooke-modified AL (CMAL) was experimentally applied to the Haigis formula. All the newer formulas performed well, but they did not significantly outperform the Haigis formula. In addition, all the newer formulas exhibited significant myopic outcomes (- 0.23 to - 0.29 diopters) in long eyes. Application of the CMAL to the Haigis formula with single constant optimization produced similar behavior and higher correlation with the newer formulas. The CMAL-applied triple-optimized Haigis formula yielded a substantially smaller SD, even superior to the Barrett and Hoffer QST formulas. The AL modification algorithms such as the CMAL used in newer formulas to cope with optical biometry's overestimation of the AL in long eyes seemed to overcompensate, particularly in the long eyes of the East Asian population.
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Affiliation(s)
- Jinchul Kim
- Department of Ophthalmology, Miracle Eye Clinic, Teheran-ro, Gangnam-gu, Seoul, 06134, South Korea.
| | - Joonsung Park
- Department of Ophthalmology, Miracle Eye Clinic, Teheran-ro, Gangnam-gu, Seoul, 06134, South Korea
| | - Yoonjung Jo
- Department of Ophthalmology, Miracle Eye Clinic, Teheran-ro, Gangnam-gu, Seoul, 06134, South Korea
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25
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Eom Y, Bae SH, Yang SK, Kim DH, Song JS, Cooke DL. Modified intraocular lens power selection method according to biometric subgroups Eom IOL power calculator. Sci Rep 2024; 14:4228. [PMID: 38378801 PMCID: PMC10879518 DOI: 10.1038/s41598-024-54346-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2023] [Accepted: 02/12/2024] [Indexed: 02/22/2024] Open
Abstract
This study evaluates the accuracy of a newly developed intraocular lens (IOL) power calculation method that applies four different IOL power calculation formulas according to 768 biometric subgroups based on keratometry, anterior chamber depth, and axial length. This retrospective cross-sectional study was conducted in at Korea University Ansan Hospital. A total of 1600 eyes from 1600 patients who underwent phacoemulsification and a ZCB00 IOL in-the-bag implantation were divided into two datasets: a reference dataset (1200 eyes) and a validation dataset (400 eyes). Using the reference dataset and the results of previous studies, the Eom IOL power calculator was developed using 768 biometric subgroups. The median absolute errors (MedAEs) and IOL Formula Performance Indexes (FPIs) of the Barrett Universal II, Haigis, Hoffer Q, Holladay 1, Ladas Super, SRK/T, and Eom formulas using the 400-eye validation dataset were compared. The MedAE of the Eom formula (0.22 D) was significantly smaller than that of the other four formulas, except for the Barrett Universal II and Ladas Super formulas (0.24 D and 0.23 D, respectively). The IOL FPI of the Eom formula was 0.553, which ranked first, followed by the Ladas Super (0.474), Barrett Universal II (0.470), Holladay 1 (0.444), Hoffer Q (0.396), Haigis (0.392), and SRK/T (0.361) formulas. In conclusion, the Eom IOL power calculator developed in this study demonstrated similar or slightly better accuracy than the Barrett Universal II and Ladas Super formulas and was superior to the four traditional IOL power calculation formulas.
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Grants
- 13-2020-007 SNUBH Research Fund
- K1625491, K1722121, K1811051, K1913161, and K2010921 Korea University Ansan Hospital grant
- K1625491, K1722121, K1811051, K1913161, and K2010921 Korea University grant
- Project Number: 1711174253, RS-2020-KD000296 Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety)
- 2020002960007, NTIS-1485017544 Korea Environment Industry & Technology Institute(KEITI) through Technology Development Project for Safety Management of Household Chemical Products, funded by Korea Ministry of Environment(MOE)
- S3127902 Technology development Program(S3127902) funded by the Ministry of SMEs and Startups(MSS, Korea)
- S3305836 Technology development Program(S3305836) funded by the Ministry of SMEs and Startups(MSS, Korea)
- NRF-2021R1F1A1062017 National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT)
- No. RS-2023-00259877 'Technical start-up corporation fostering project' through the Commercialization Promotion Agency for R&D Outcomes(COMPA) grant funded by the Korea government(MSIT)
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Affiliation(s)
- Youngsub Eom
- Department of Ophthalmology, Korea University Ansan Hospital, 123, Jeokgeum-ro, Danwon-gu, Ansan-si, Gyeonggi-do, 15355, South Korea.
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Republic of Korea.
- Department of Ophthalmology, Emory University School of Medicine, Emory Clinic Building B, 1365B Clifton Road, Atlanta, NEGA, 30322, USA.
| | - So Hyeon Bae
- Department of Ophthalmology, Korea University Ansan Hospital, 123, Jeokgeum-ro, Danwon-gu, Ansan-si, Gyeonggi-do, 15355, South Korea
| | - Seul Ki Yang
- Space Optics Laboratory, Department of Astronomy, Yonsei University, Seoul, Republic of Korea
- Satellite System 3 Team, Hanwha Systems Co., Ltd., Yongin‑si, Gyeonggi‑do, Republic of Korea
| | - Dong Hyun Kim
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Republic of Korea
| | - Jong Suk Song
- Department of Ophthalmology, Korea University College of Medicine, Seoul, Republic of Korea
| | - David L Cooke
- Great Lakes Eye Care, 2848 Niles Road, Saint Joseph, MI, 49085, USA.
- Department of Neurology and Ophthalmology, School of Osteopathic Medicine, Michigan State University, East Lansing, MI, USA.
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Li Y, Cheng Z, Wang C, Lin J, Jiang H, Cui M. Geometric transformation adaptive optics (GTAO) for volumetric deep brain imaging through gradient-index lenses. Nat Commun 2024; 15:1031. [PMID: 38310087 PMCID: PMC10838304 DOI: 10.1038/s41467-024-45434-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Accepted: 01/22/2024] [Indexed: 02/05/2024] Open
Abstract
The advance of genetic function indicators has enabled the observation of neuronal activities at single-cell resolutions. A major challenge for the applications on mammalian brains is the limited optical access depth. Currently, the method of choice to access deep brain structures is to insert miniature optical components. Among these validated miniature optics, the gradient-index (GRIN) lens has been widely employed for its compactness and simplicity. However, due to strong fourth-order astigmatism, GRIN lenses suffer from a small imaging field of view, which severely limits the measurement throughput and success rate. To overcome these challenges, we developed geometric transformation adaptive optics (GTAO), which enables adaptable achromatic large-volume correction through GRIN lenses. We demonstrate its major advances through in vivo structural and functional imaging of mouse brains. The results suggest that GTAO can serve as a versatile solution to enable large-volume recording of deep brain structures and activities through GRIN lenses.
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Affiliation(s)
- Yuting Li
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Bindley Bioscience Center, Purdue University, West Lafayette, IN, 47907, USA
| | - Zongyue Cheng
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Bindley Bioscience Center, Purdue University, West Lafayette, IN, 47907, USA
| | - Chenmao Wang
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Bindley Bioscience Center, Purdue University, West Lafayette, IN, 47907, USA
| | - Jianian Lin
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Bindley Bioscience Center, Purdue University, West Lafayette, IN, 47907, USA
| | - Hehai Jiang
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA
- Bindley Bioscience Center, Purdue University, West Lafayette, IN, 47907, USA
| | - Meng Cui
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN, 47907, USA.
- Bindley Bioscience Center, Purdue University, West Lafayette, IN, 47907, USA.
- Department of Biology, Purdue University, West Lafayette, IN, 47907, USA.
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Shukhaev SV, Pustozerov E, Boiko EV, Kirillova OV. The accuracy of the trifocal IOL calculation using equivalent K-readings and total corneal power in different zones. Graefes Arch Clin Exp Ophthalmol 2024; 262:495-504. [PMID: 37650898 DOI: 10.1007/s00417-023-06198-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Revised: 06/25/2023] [Accepted: 08/05/2023] [Indexed: 09/01/2023] Open
Abstract
PURPOSE To identify the equivalent K-readings and total keratometry zones that is optimally suitable for calculating the IOL spheroequivalent according to 7 formulas. METHODS The study included 40 patients (40 eyes) who underwent uneventful femtosecond laser-assisted cataract surgery and refractive lens exchange (RLE) with implantation of a trifocal diffractive IOL (PanOptix, Alcon inc.). Targeted emmetropia was achieved in all patients, no distance and near correction was needed. Retrospective IOL calculations were performed utilizing 7 formulas (SRK/T, Holladay 1 and 2, Haigis, Hoffer Q, Barrett Universal 2, Olsen) and Pentacam keratometry data: Holladay equivalent K-readings, total optical power by ray tracing (TCRP) centered on the apex and pupil in 10 zones (from 0.5 to 5 mm in 0.5 mm increments). For each formula/zone/map combination: postoperative predicted refraction (PPRs), mean absolute errors (MAEs), and median absolute errors (MedAEs) were analyzed. RESULTS According to EKR, the Haigis formula showed the lowest error in the central zones up to 3.5 mm, the TCRP zone for Holladay I and II formulas 4.0-4.5 mm, for HofferQ and SRK/T formulas 4.5-5.0 mm, and for Olsen and Barrett II Universal-5 mm. CONCLUSION The use of keratometry data (EKR, TCRP) in the formulas adapted to SimK, with the correct choice of the evaluation zone of keratometric data, will increase the chance of hitting the refractive target.
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Affiliation(s)
- Sergey Viktorovich Shukhaev
- S. Fyodorov Eye Microsurgery Federal State Institution, 192283, Saint Petersburg, Y. Gasheka St, 21, Russia.
| | - Evgenii Pustozerov
- Exposit Consulting Sp. Z o.o., 80-890, Gdańsk, Jana Heweliusza 11/819, Poland
| | - Ernest Vitalievich Boiko
- S. Fyodorov Eye Microsurgery Federal State Institution, 192283, Saint Petersburg, Y. Gasheka St, 21, Russia
| | - Olga Valerievna Kirillova
- S. Fyodorov Eye Microsurgery Federal State Institution, 192283, Saint Petersburg, Y. Gasheka St, 21, Russia
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Langenbucher A, Szentmáry N, Cayless A, Gatinel D, Debellemanière G, Wendelstein J, Hoffmann P. Monte-Carlo simulation of a thick lens IOL power calculation. Acta Ophthalmol 2024; 102:e42-e52. [PMID: 37032495 DOI: 10.1111/aos.15666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 03/10/2023] [Accepted: 03/27/2023] [Indexed: 04/11/2023]
Abstract
BACKGROUND The purpose of this Monte-Carlo study is to investigate the effect of using a thick lens model instead of a thin lens model for the intraocular lens (IOL) on the resulting refraction at the spectacle plane and on the ocular magnification based on a large clinical data set. METHODS A pseudophakic model eye with a thin spectacle correction, a thick cornea (curvatures for both surfaces and central thickness) and a thick IOL (equivalent power PL derived from a thin lens IOL, Coddington factor CL (uniformly distributed from -1.0 to 1.0), either preset central thickness LT = 0.9 mm (A) or optic edge thickness ET = 0.2 mm, (B)) was set up. Calculations were performed on a clinical data set containing 21 108 biometric measurements of a cataractous population based on linear Gaussian optics to derive spectacle refraction and ocular magnification using the thin and thick lens IOL models. RESULTS A prediction model (restricted to linear terms without interactions) was derived based on the relevant parameters identified with a stepwise linear regression approach to provide a simple method for estimating the change in spectacle refraction and ocular magnification where a thick lens IOL is used instead of a thin lens IOL. The change in spectacle refraction using a thick lens IOL with (A) or (B) instead of a thin lens IOL with identical power was within limits of around ±1.5 dpt when the thick lens IOL was placed with its haptic plane at the plane of the thin lens IOL. In contrast, the change in ocular magnification from considering the IOL as a thick lens instead of a thin lens was small and not clinically significant. CONCLUSION This Monte-Carlo simulation shows the impact of using a thick lens model IOL with preset LT or ET on the resulting spherical equivalent refraction and ocular magnification. If IOL manufacturers would provide all relevant data on IOL design data and refractive index for all power steps, this would make it possible to perform direct calculations of refraction and ocular magnification.
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Affiliation(s)
- Achim Langenbucher
- Department of Experimental Ophthalmology, Saarland University, Homburg/Saar, Germany
| | - Nóra Szentmáry
- Dr. Rolf M. Schwiete Center for Limbal Stem Cell and Aniridia Research, Saarland University, Homburg/Saar, Germany
- Department of Ophthalmology, Semmelweis-University, Budapest, Hungary
| | - Alan Cayless
- School of Physical Sciences, The Open University, Milton Keynes, UK
| | | | | | - Jascha Wendelstein
- Department of Experimental Ophthalmology, Saarland University, Homburg/Saar, Germany
- Institut für Refraktive- und Ophthalmo-Chirurgie (IROC), Zurich, Switzerland
- Department of Ophthalmology, Johannes Kepler University Linz, Linz, Austria
| | - Peter Hoffmann
- Augen- und Laserklinik Castrop-Rauxel, Castrop-Rauxel, Germany
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Wei Y, Liu Y, Li H, Song H. Theoretical Accuracy of the Raytracing Method for Intraocular Calculation of Lens Power in Myopic Eyes after Small Incision Extraction of the Lenticule. Klin Monbl Augenheilkd 2024; 241:221-229. [PMID: 37722612 PMCID: PMC10898958 DOI: 10.1055/a-2177-4998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/20/2023]
Abstract
AIM To evaluate the accuracy of the raytracing method for the calculation of intraocular lens (IOL) power in myopic eyes after small incision extraction of the lenticule (SMILE). METHODS Retrospective study. All patients undergoing surgery for myopic SMILE between May 1, 2020, and December 31, 2020, with Scheimpflug tomography optical biometry were eligible for inclusion. Manifest refraction was performed before and 6 months after refractive surgery. One eye from each patient was included in the final analysis. A theoretical model was invited to predict the accuracy of multiple methods of lens power calculation by comparing the IOL-induced refractive error at the corneal plane (IOL-Dif) and the SMILE-induced change of spherical equivalent (SMILE-Dif) before and after SMILE surgery. The prediction error (PE) was calculated as the difference between SMILE-Dif-IOL-Dif. IOL power calculations were performed using raytracing (Olsen Raytracing, Pentacam AXL, software version 1.22r05, Wetzlar, Germany) and other formulae with historical data (Barrett True-K, Double-K SRK/T, Masket, Modified Masket) and without historical data (Barrett True-K no history, Haigis-L, Hill Potvin Shammas PM, Shammas-PL) for the same IOL power and model. In addition, subgroup analysis was performed in different anterior chamber depths, axial lengths, back-to-front corneal radius ratio, keratometry, lens thickness, and preoperative spherical equivalents. RESULTS A total of 70 eyes of 70 patients were analyzed. The raytracing method had the smallest mean absolute PE (0.26 ± 0.24 D) and median absolute PE (0.16 D), and also had the largest percentage of eyes within a PE of ± 0.25 D (64.3%), ± 0.50 D (81.4%), ± 0.75 D (95.7%), and ± 1.00 D (100.0%). The raytracing method was significantly better than Double-K SRK/T, Haigis, Haigis-L, and Shammas-PL formulae in postoperative refraction prediction (all p < 0.001), but not better than the following formulae: Barrett True-K (p = 0.314), Barrett True-K no history (p = 0.163), Masket (p = 1.0), Modified Masket (p = 0.806), and Hill Potvin Shammas PM (p = 0.286). Subgroup analysis showed that refractive outcomes exhibited no statistically significant differences in the raytracing method (all p < 0.05). CONCLUSION Raytracing was the most accurate method in predicting target refraction and had a good consistency in calculating IOL power for myopic eyes after SMILE.
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Affiliation(s)
- Yinjuan Wei
- Department of Cataract, Tianjin Eye Hospital, Tianjin, China
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
| | - Yianzhu Liu
- Department of Cataract, Tianjin Eye Hospital, Tianjin, China
- Tianjin Key Lab of Ophthalmology and Visual Science, Tianjin, China
| | - Hongyu Li
- Department of Ophthalmology, Chinese PLA General Hospital, Beijing, China
| | - Hui Song
- Department of Cataract, Tianjin Medical University Eye Hospital, Tianjin, China
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Ferrara S, Crincoli E, Savastano A, Savastano MC, Catania F, Rizzo S. Refractive Outcomes With New Generation Formulas for Intraocular Lens Power Calculation in Radial Keratotomy Patients. Cornea 2024; 43:178-183. [PMID: 37126644 DOI: 10.1097/ico.0000000000003301] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 03/29/2023] [Indexed: 05/03/2023]
Abstract
PURPOSE Radial keratotomies (RKs) are responsible for corneal irregularities resulting in biometric errors and lower best-corrected visual acuity (BCVA) due to lower-order and higher-order optical aberrations. The aim of the study was to compare performances of new and old generation formulas in a population of RK patients. METHODS RK patients who underwent phacoemulsification with intraocular lens (IOL) implantation were retrospectively recruited. Inclusion criteria were availability of preoperative and 6-month postoperative BCVA assessment, topography, and tomography. Documented refraction instability, corneal ectasia, and previous ocular surgery except for RK were exclusion criteria. Mean prediction error (ME), mean absolute prediction error (MAE), and incidence of MAE > 0.25D were calculated for SRK-T, Barrett True K, EVO 2.0, Kane, and PEARL-DGS. RESULTS Twenty-seven patients with a mean baseline BCVA of 0.32 ± 0.18 logMAR and a mean corneal root mean square (RMS) value of 1.59 ± 0.91 μm were included. EVO 2.0, Kane, and PEARL-DGS showed a significantly lower MAE and lower ME compared with all other formulas ( P < 0.001 and P < 0.001) and a significant lower incidence of MAE >0.25D ( P < 0.001). Significant differences were still detected when using 3-mm mean keratometry for IOL calculation. CONCLUSIONS PEARL-DGS, Kane, and EVO 2.0 formulas show superior accuracy in IOL power calculation compared with SRK-T and Barrett True K in RK patients, with no significant differences between the 3.
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Affiliation(s)
- Silvia Ferrara
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
| | - Emanuele Crincoli
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
- Department of Ophthalmology, Centre Hospitalier Intercommunal de Créteil, Créteil, France
| | - Alfonso Savastano
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
| | - Maria Cristina Savastano
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
| | - Fiammetta Catania
- Department of Biomedical Sciences, Humanitas University, Milan, Italy; and
| | - Stanislao Rizzo
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
- "Consiglio Nazionale delle Ricerche, Istituto di Neuroscienze", Pisa, Italy
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Savini G, Taroni L, Hoffer KJ. Comment on: Efficacy of segmented axial length and artificial intelligence approaches to intraocular lens power calculation in short eyes. J Cataract Refract Surg 2024; 50:195. [PMID: 37994103 DOI: 10.1097/j.jcrs.0000000000001358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 10/31/2023] [Indexed: 11/24/2023]
Affiliation(s)
- Giacomo Savini
- From the I.R.C.C.S.-G.B. Bietti Foundation, Rome, Italy (Savini); Ophthalmology Unit, Morgagni-Pierantoni Hospital, Forlì, Italy (Taroni); Stein Eye Institute, University of California, Los Angeles, California (Hoffer); St. Mary's Eye Center, Santa Monica, California (Hoffer)
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Savini G, Hoffer KJ, Kohnen T. IOL power formula classifications. J Cataract Refract Surg 2024; 50:105-107. [PMID: 38259130 DOI: 10.1097/j.jcrs.0000000000001378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
Affiliation(s)
- Giacomo Savini
- From the IRCCS Bietti Foundation, Rome, Italy (Savini); St. Mary's Eye Center, Santa Monica, California (Hoffer); Stein Eye Institute, Los Angeles, California (Hoffer); Department of Ophthalmology, Goethe-University, Frankfurt am Main, Germany (Kohnen)
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Wang L, Kozhaya K, Weikert MP, Koch DD. Reply : Efficacy of segmented axial length and artificial intelligence approaches to intraocular lens power calculation in short eyes. J Cataract Refract Surg 2024; 50:195-196. [PMID: 38170943 DOI: 10.1097/j.jcrs.0000000000001387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 12/21/2023] [Indexed: 01/05/2024]
Affiliation(s)
- Li Wang
- From the Cullen Eye Institute, Department of Ophthalmology, Baylor College of Medicine, Houston, Texas
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Lachance GP, Gauvreau D, Boisselier É, Boukadoum M, Miled A. Breaking Barriers: Exploring Neurotransmitters through In Vivo vs. In Vitro Rivalry. Sensors (Basel) 2024; 24:647. [PMID: 38276338 DOI: 10.3390/s24020647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 01/11/2024] [Accepted: 01/16/2024] [Indexed: 01/27/2024]
Abstract
Neurotransmitter analysis plays a pivotal role in diagnosing and managing neurodegenerative diseases, often characterized by disturbances in neurotransmitter systems. However, prevailing methods for quantifying neurotransmitters involve invasive procedures or require bulky imaging equipment, therefore restricting accessibility and posing potential risks to patients. The innovation of compact, in vivo instruments for neurotransmission analysis holds the potential to reshape disease management. This innovation can facilitate non-invasive and uninterrupted monitoring of neurotransmitter levels and their activity. Recent strides in microfabrication have led to the emergence of diminutive instruments that also find applicability in in vitro investigations. By harnessing the synergistic potential of microfluidics, micro-optics, and microelectronics, this nascent realm of research holds substantial promise. This review offers an overarching view of the current neurotransmitter sensing techniques, the advances towards in vitro microsensors tailored for monitoring neurotransmission, and the state-of-the-art fabrication techniques that can be used to fabricate those microsensors.
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Affiliation(s)
| | - Dominic Gauvreau
- Department Electrical Engineering, Université Laval, Québec, QC G1V 0A6, Canada
| | - Élodie Boisselier
- Department Ophthalmology and Otolaryngology-Head and Neck Surgery, Université Laval, Québec, QC G1V 0A6, Canada
| | - Mounir Boukadoum
- Department Computer Science, Université du Québec à Montréal, Montréal, QC H2L 2C4, Canada
| | - Amine Miled
- Department Electrical Engineering, Université Laval, Québec, QC G1V 0A6, Canada
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Lee H, Jung JH, Hong S, Choi HJ. Near eye display based on multiplexed retinal projections for robust compensation of eye pupil variance. Opt Express 2024; 32:2631-2643. [PMID: 38297787 DOI: 10.1364/oe.510069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Accepted: 01/01/2024] [Indexed: 02/02/2024]
Abstract
Among various specifications of near eye display (NED) devices, a compact formfactor is essential for comfortable user experience but also the hardest one to accomplish due to the slowest progresses. A pinhole/pinlight array based light-field (LF) technique is considered as one of the candidates to achieve that goal without thicker and heavier refractive optics. Despite those promising advantages, however, there are critical issues, such as dark spots and contrast distortion, which degrade the image quality because of the vulnerability of the LF retinal image when the observer's eye pupil size changes. Regardless of previous attempts to overcome those artifacts, it was impossible to resolve both issues due to their trade-off relation. In this paper, in order to resolve them simultaneously, we propose a concept of multiplexed retinal projections to integrate the LF retinal image through rotating transitions of refined and modulated elemental images for robust compensation of eye pupil variance with improved conservation of contrast distribution. Experimental demonstrations and quantitative analysis are also provided to verify the principle.
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Neutens P, Zinoviev K, Jimenez Valencia AM, Woronoff G, Jansen R, Hosseini N, Uribe AJ, Goheen J, Kryszak LA, Stakenborg T, Clarke WA, Van Roy W. Toward point-of-care diagnostics: Running enzymatic assays on a photonic waveguide-based sensor chip with a portable, benchtop measurement system. J Biophotonics 2024; 17:e202300279. [PMID: 37703421 DOI: 10.1002/jbio.202300279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 09/11/2023] [Accepted: 09/12/2023] [Indexed: 09/15/2023]
Abstract
We demonstrate a portable, compact system to perform absorption-based enzymatic assays at a visible wavelength of 639 nm on a photonic waveguide-based sensor chip, suitable for lab-on-a-chip applications. The photonic design and fabrication of the sensor are described, and a detailed overview of the portable measurement system is presented. In this publication, we use an integrated photonic waveguide-based absorbance sensor to run a full enzymatic assay. An assay to detect creatinine in plasma is simultaneously performed on both the photonic sensor on the portable setup and on a commercial microplate reader for a clinically relevant creatinine concentration range. We observed a high correlation between the measured waveguide propagation loss and the optical density measurement from the plate reader and measured a limit-of-detection of 4.5 μM creatinine in the sensor well, covering the relevant clinical range for creatinine detection.
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Affiliation(s)
- Pieter Neutens
- Life Science Technologies Department, Imec, Leuven, Belgium
| | | | - Angela M Jimenez Valencia
- Laboratory for Integrated Nanodiagnostics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | | | - Roelof Jansen
- Life Science Technologies Department, Imec, Leuven, Belgium
| | - Naser Hosseini
- Life Science Technologies Department, Imec, Leuven, Belgium
| | | | - Joshua Goheen
- Laboratory for Integrated Nanodiagnostics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Lindsay A Kryszak
- Laboratory for Integrated Nanodiagnostics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Tim Stakenborg
- Life Science Technologies Department, Imec, Leuven, Belgium
| | - William A Clarke
- Laboratory for Integrated Nanodiagnostics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
- Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
| | - Willem Van Roy
- Life Science Technologies Department, Imec, Leuven, Belgium
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Kenny PI, Kozhaya K, Truong P, Wang L, Koch DD, Weikert MP. Performance of IOL calculation formulas that use measured posterior corneal power in eyes following myopic laser vision correction. J Cataract Refract Surg 2024; 50:7-11. [PMID: 37702522 DOI: 10.1097/j.jcrs.0000000000001300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 08/29/2023] [Indexed: 09/14/2023]
Abstract
PURPOSE To compare the predictive accuracy of the biometer-embedded Barrett True-K TK and new total corneal power methods of intraocular lens (IOL) power calculation in eyes with prior laser vision correction (LVC) for myopia. SETTING Academic clinical practice. DESIGN Retrospective case series. METHODS IOL power formulas were assessed using measurements from a swept-source optical coherence biometer. Refractive prediction errors were calculated for the Barrett True-K TK, EVO 2.0, Pearl-DGS, and HofferQST, which use both anterior and posterior corneal curvature measurements. These were compared with the Shammas, Haigis-L, Barrett True-K No History (NH), optical coherence tomography, and 4-formula average (AVG-4) on the ASCRS postrefractive calculator, and to the Holladay 1 and 2 with non linear axial length regressions (H1- and H2-NLR). RESULTS The study comprised 85 eyes from 85 patients. Only the Barrett True-K TK and EVO 2.0 had mean numerical errors that were not significantly different from 0. The EVO 2.0, Barrett True-K TK, Pearl-DGS, AVG-4, H2-NLR, and Barrett True-K NH were selected for further pairwise analysis. The Barrett True-K TK and EVO 2.0 demonstrated smaller root-mean-square absolute error compared with the Pearl-DGS, and the Barrett True-K TK also had a smaller mean absolute error than the Pearl-DGS. CONCLUSIONS The Barrett True-K TK and EVO 2.0 formulas had comparable performance to existing formulas in eyes with prior myopic LVC.
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Affiliation(s)
- Peter I Kenny
- From the Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, Texas
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Gupta V, Pal H, Sawhney S, Aggarwal A, Vanathi M, Luthra G. Optimization of biometry for best refractive outcome in cataract surgery. Indian J Ophthalmol 2024; 72:29-43. [PMID: 38131567 PMCID: PMC10841781 DOI: 10.4103/ijo.ijo_1219_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/23/2023] [Accepted: 08/29/2023] [Indexed: 12/23/2023] Open
Abstract
High-precision biometry and accurate intraocular lens (IOL) power calculation have become essential components of cataract surgery. In clinical practice, IOL power calculation involves measuring parameters such as corneal power and axial length and then applying a power calculation formula. The importance of posterior corneal curvature in determining the true power of the cornea is increasingly being recognized, and newer investigative modalities that can estimate both the anterior and posterior corneal power are becoming the standard of care. Optical biometry, especially using swept-source biometers, with an accuracy of 0.01-0.02 mm, has become the state-of-the-art method in biometry. With the evolution of IOL formulas, the ultimate goal of achieving a given target refraction has also moved closer to accuracy. However, despite these technological efforts to standardize and calibrate methods of IOL power calculation, achieving a mean absolute error of zero for every patient undergoing cataract surgery may not be possible. This is due to inherent consistent bias and systematic errors in the measurement devices, IOL formulas, and the individual bias of the surgeon. Optimization and personalization of lens constants allow for the incorporation of these systematic errors as well as individual bias, thereby further improving IOL power prediction accuracy. Our review provides a comprehensive overview of parameters for accurate biometry, along with considerations to enhance IOL power prediction accuracy through optimization and personalization. We conducted a detailed search in PubMed and Google Scholar by using a combination of MeSH terms and specific keywords such as "ocular biometry," "IOL power calculations," "prediction accuracy of refractive outcome in cataract surgery," "effective lens position," "intraocular lens calculation formulas," and "optimization of A-constants" to find relevant literature. We identified and analyzed 121 relevant articles, and their findings were included.
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Affiliation(s)
- Vinita Gupta
- Department of Ophthalmology, All India Institute of Medical Sciences, Rishikesh, Uttarakhand, India
| | - Himani Pal
- Department of Ophthalmology, Government Doon Medical College, Dehradun, Uttarakhand, India
| | - Saurabh Sawhney
- Data Scientist, Department of Artificial Intelligence, Koverhoop Technologies, Canada
| | | | - Murugesan Vanathi
- Dr. R.P. Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
| | - Gaurav Luthra
- Director and Consultant, Cataract and Refractive Services, Drishti Eye Institute, Dehradun, Uttarakhand, India
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Ting DSJ, Gatinel D, Ang M. Cataract surgery after corneal refractive surgery: preoperative considerations and management. Curr Opin Ophthalmol 2024; 35:4-10. [PMID: 37962882 DOI: 10.1097/icu.0000000000001006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
PURPOSE OF REVIEW Corneal refractive surgery (CRS) is one of the most popular eye procedures, with more than 40 million cases performed globally. As CRS-treated patients age and develop cataract, the number of cases that require additional preoperative considerations and management will increase around the world. Thus, we provide an up-to-date, concise overview of the considerations and outcomes of cataract surgery in eyes with previous CRS, including surface ablation, laser in-situ keratomileusis (LASIK), and small-incision lenticule extraction (SMILE). RECENT FINDINGS Challenges associated with accurate biometry in eyes with CRS have been mitigated recently through total keratometry, ray tracing, intraoperative aberrometry, and machine learning assisted intraocular lens (IOL) power calculation formulas to improve prediction. Emerging studies have highlighted the superior performance of ray tracing and/or total keratometry-based formulas for IOL power calculation in eyes with previous SMILE. Dry eye remains a common side effect after cataract surgery, especially in eyes with CRS, though the risk appears to be lower after SMILE than LASIK (in the short-term). Recent presbyopia-correcting IOL designs such as extended depth of focus (EDOF) IOLs may be suitable in carefully selected eyes with previous CRS. SUMMARY Ophthalmologists will increasingly face challenges associated with the surgical management of cataract in patients with prior CRS. Careful preoperative assessment of the ocular surface, appropriate use of IOL power calculation formulas, and strategies for presbyopia correction are key to achieve good clinical and refractive outcomes and patient satisfaction. Recent advances in CRS techniques, such as SMILE, may pose new challenges for such eyes in the future.
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Affiliation(s)
- Darren S J Ting
- Birmingham and Midland Eye Centre, Birmingham
- Academic Unit of Ophthalmology, Institute of Inflammation and Ageing, University of Birmingham
- Academic Ophthalmology, School of Medicine, University of Nottingham, Nottingham, UK
| | - Damien Gatinel
- Department of Anterior Segment and Refractive Surgery, Rothschild Foundation Hospital, Paris, France
| | - Marcus Ang
- Singapore National Eye Centre, Singapore Eye Research Institute
- Duke-NUS Medical School, National University of Singapore, Singapore, Singapore
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Ma Y, Xiong R, Liu Z, Young CA, Wu Y, Zheng D, Zhang X, Jin G. Network Meta-analysis of Intraocular Lens Power Calculation Formula Accuracy in 1016 Eyes With Long Axial Length. Am J Ophthalmol 2024; 257:178-186. [PMID: 37726043 DOI: 10.1016/j.ajo.2023.09.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 08/27/2023] [Accepted: 09/08/2023] [Indexed: 09/21/2023]
Abstract
PURPOSE To systematically review the literature and quantitatively synthesize the currently available evidence to compare the accuracy of different intraocular lens calculation formulas in eyes with long axial length (AL). DESIGN Network meta-analysis. METHODS PubMed, Embase, Web of Science, and the Cochrane Library were systematically searched for studies published between January 2000 and June 2022. Included were prospective or retrospective clinical studies reporting the following outcomes in cataract patients with long AL (ie, ≥26 mm): percentage of eyes with a prediction error (PE) within ±0.25, ±0.50, and ±1.00 diopters (D). Network meta-analysis was conducted using R software (version 4.2.1). RESULTS Ten prospective or retrospective clinical studies, including 1016 eyes and 11 calculation formulas, were identified. A traditional meta-analysis showed that for the percentage of eyes with PE within ±0.25 and ±0.50 D, the Olsen, Kane, and Emmetropia Verifying Optical (EVO) all had insignificantly higher percentages compared with others. Considering the percentage of eyes with PE within ±1.00 D, the original and modified Wang-Koch adjustment formulas for Holladay 1 (H1-WK and H1-MWK) and EVO formulas showed superiority, but the difference was insignificant. This network meta-analysis revealed that compared with the widely used Barrett Universal II (BUII) formula, the Olsen, Kane, and EVO formulas had higher percentages of eyes with PE within ±0.25, ±0.50, and ±1.00 D (all odds ratios >1 but P >.05). Based on the surface under the cumulative ranking area (SUCRA) values for the percentage of eyes with PE within ±0.25 D, the Olsen (96.4%), Kane (77.5%), and EVO (75.9%) formulas had the highest probability of being in the top 3 of the 11 formulas. CONCLUSIONS The Olsen, Kane, and EVO formulas may perform better than others in calculating IOL power in eyes with long AL. Nevertheless, there is still considerable uncertainty in this regard and the accuracy of these formulas in highly myopic eyes should be confirmed in studies based on large multicenter registries.
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Affiliation(s)
- Yiyuan Ma
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University (Y.M., R.X., Z.L., Y.W., D.Z., X.Z., G.J.), Guangzhou, China
| | - Ruilin Xiong
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University (Y.M., R.X., Z.L., Y.W., D.Z., X.Z., G.J.), Guangzhou, China
| | - Zhenzhen Liu
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University (Y.M., R.X., Z.L., Y.W., D.Z., X.Z., G.J.), Guangzhou, China
| | | | - Yue Wu
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University (Y.M., R.X., Z.L., Y.W., D.Z., X.Z., G.J.), Guangzhou, China
| | - Danying Zheng
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University (Y.M., R.X., Z.L., Y.W., D.Z., X.Z., G.J.), Guangzhou, China
| | - Xinyu Zhang
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University (Y.M., R.X., Z.L., Y.W., D.Z., X.Z., G.J.), Guangzhou, China
| | - Guangming Jin
- From the State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University (Y.M., R.X., Z.L., Y.W., D.Z., X.Z., G.J.), Guangzhou, China.
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Jacques SL. Honoring Lihong V. Wang, a pioneer in biomedical optics. J Biomed Opt 2024; 29:S11501. [PMID: 38094083 PMCID: PMC10716686 DOI: 10.1117/1.jbo.29.s1.s11501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 09/29/2023] [Indexed: 12/18/2023]
Abstract
A pioneer in optics based on his development of novel optical imaging techniques and acknowledged by a long list of honors, Lihong V. Wang is a model for the aspiring young student or investigator pursuing a career in the rapidly expanding field of biomedical optics and biophotonics.
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Affiliation(s)
- Steven L. Jacques
- University of Washington, Department of Bioengineering, Seattle, Washington, United States
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Rong G, Sawan M. Tamm Plasmon Polariton Biosensors Based on Porous Silicon: Design, Validation and Analysis. Biosensors (Basel) 2023; 13:1026. [PMID: 38131786 PMCID: PMC10742303 DOI: 10.3390/bios13121026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/06/2023] [Accepted: 12/08/2023] [Indexed: 12/23/2023]
Abstract
Tamm Plasmon Polariton (TPP) is a nanophotonic phenomenon that has attracted much attention due to its spatial strong field confinement, ease of mode excitation, and polarization independence. TPP has applications in sensing, storage, lasing, perfect absorber, solar cell, nonlinear optics, and many others. In this work, we demonstrate a biosensing platform based on TPP resonant mode. Both theoretical analyses based on the transfer matrix method and experimental validation through nonspecific detection of liquids of different refractive indices and specific detection of SARS-CoV-2 nucleocapsid protein (N-protein) are presented. Results show that the TPP biosensor has high sensitivity and good specificity. For N-protein detection, the sensitivity can be up to 1.5 nm/(µg/mL), and the limit of detection can reach down to 7 ng/mL with a spectrometer of 0.01 nm resolution in wavelength shift. Both nonspecific detection of R.I. liquids and specific detection of N-protein have been simulated and compared with experimental results to demonstrate consistency. This work paves the way for design, optimization, fabrication, characterization, and performance analysis of TPP based biosensors.
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Affiliation(s)
| | - Mohamad Sawan
- CenBRAIN Neurotech Center of Excellence, School of Engineering, Westlake University, 600 Dunyu Road, Xihu District, Hangzhou 310030, China;
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Tang L, Chen Z. Twisted system makes nanolasers shine together. Nature 2023; 624:260-261. [PMID: 38092905 DOI: 10.1038/d41586-023-03783-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
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Mo E, Feng K, Li Q, Xu J, Cen J, Li J, Zhao YE. Efficacy of corneal curvature on the accuracy of 8 intraocular lens power calculation formulas in 302 highly myopic eyes. J Cataract Refract Surg 2023; 49:1195-1200. [PMID: 37702529 DOI: 10.1097/j.jcrs.0000000000001303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 08/29/2023] [Indexed: 09/14/2023]
Abstract
PURPOSE To investigate the effect of corneal curvature (K) on the accuracy of 8 intraocular lens formulas in highly myopic eyes. SETTING Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, China. DESIGN Retrospective consecutive case series. METHODS 302 eyes (302 patients) were analyzed in subgroups based on the K value. The mean refractive error, mean absolute error (MAE), median absolute error (MedAE), root-mean-square absolute prediction error (RMSAE) and proportions of eyes within ±0.25 diopter (D), ±0.50 D, ±0.75 D, ±1.00 D were statistical analyzed. RESULTS Emmetropia Verifying Optical (EVO) 2.0, Kane, and Radial Basis Function (RBF) 3.0 had the lower MAE (≤0.28) and RMSAE (≤0.348) and highest percentage of eyes within ±0.50 D (≥83.58%) in the flat (K ≤ 43 D) and steep K (K > 45 D) groups. Hoffer QST had the lowest MedAE (0.19), RMSAE (0.351) and the highest percentage of eyes within ±0.50 D (82.98%) in the normal K group (43 < K ≤ 45 D). When axial length (AL) ≤28 mm, all formulas showed close RMSAE values (0.322 to 0.373) in flat K group. When AL >28 mm, RBF 3.0 achieved the lowest MAE (≤0.24), MedAE (≤0.17) and RMSAE (≤0.337) across all subgroups. CONCLUSIONS EVO 2.0, Kane, and RBF 3.0 were the most accurate in highly myopic eyes with a flat or steep K. Hoffer QST is recommended for long eyes with normal K values. RBF 3.0 showed the highest accuracy when AL >28 mm, independent of corneal curvature.
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Affiliation(s)
- Er Mo
- From the National Clinical Research Center for Ocular Diseases, Eye Hospital, Wenzhou Medical University, Wenzhou, China (Mo, Feng, Q. Li, Xu, Cen, J. Li, Zhao); Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China (Mo, Feng, Q. Li, Xu, Cen, J. Li, Zhao); Eye Hospital of Wenzhou Medical University Hangzhou Branch, Hangzhou, Zhejiang, China (Zhao)
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Damagatla V, Lanka P, Brodu A, Noordzij N, Qin-Dregely J, Farina A, Pifferi A. Interstitial null-distance time-domain diffuse optical spectroscopy using a superconducting nanowire detector. J Biomed Opt 2023; 28:121202. [PMID: 37021124 PMCID: PMC10069643 DOI: 10.1117/1.jbo.28.12.121202] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 01/09/2023] [Indexed: 05/18/2023]
Abstract
Significance Interstitial fiber-based spectroscopy is gaining interest for real-time in vivo optical biopsies, endoscopic interventions, and local monitoring of therapy. Different from other photonics approaches, time-domain diffuse optical spectroscopy (TD-DOS) can probe the tissue at a few cm distance from the fiber tip and disentangle absorption from the scattering properties. Nevertheless, the signal detected at a short distance from the source is strongly dominated by the photons arriving early at the detector, thus hampering the possibility of resolving late photons, which are rich in information about depth and absorption. Aim To fully benefit from the null-distance approach, a detector with an extremely high dynamic range is required to effectively collect the late photons; the goal of our paper is to test its feasibility to perform TD-DOS measurements at null source-detector separations (NSDS). Approach In particular, we demonstrate the use of a superconducting nanowire single photon detector (SNSPD) to perform TD-DOS at almost NSDS ( ≈ 150 μ m ) by exploiting the high dynamic range and temporal resolution of the SNSPD to extract late arriving, deep-traveling photons from the burst of early photons. Results This approach was demonstrated both on Monte Carlo simulations and on phantom measurements, achieving an accuracy in the retrieval of the water spectrum of better than 15%, spanning almost two decades of absorption change in the 700- to 1100-nm range. Additionally, we show that, for interstitial measurements at null source-detector distance, the scattering coefficient has a negligible effect on late photons, easing the retrieval of the absorption coefficient. Conclusions Utilizing the SNSPD, broadband TD-DOS measurements were performed to successfully retrieve the absorption spectra of the liquid phantoms. Although the SNSPD has certain drawbacks for use in a clinical system, it is an emerging field with research progressing rapidly, and this makes the SNSPD a viable option and a good solution for future research in needle guided time-domain interstitial fiber spectroscopy.
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Affiliation(s)
- Vamshi Damagatla
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
- Address all correspondence to Vamshi Damagatla,
| | - Pranav Lanka
- Tyndall National Institute, Biophotonics, IPIC, Cork, Ireland
| | | | | | | | - Andrea Farina
- Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Milano, Italy
| | - Antonio Pifferi
- Politecnico di Milano, Dipartimento di Fisica, Milano, Italy
- Istituto di Fotonica e Nanotecnologie, Consiglio Nazionale delle Ricerche, Milano, Italy
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Furieri T, Bassi A, Bonora S. Large field of view aberrations correction with deformable lenses and multi conjugate adaptive optics. J Biophotonics 2023; 16:e202300104. [PMID: 37556187 DOI: 10.1002/jbio.202300104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 07/10/2023] [Accepted: 08/07/2023] [Indexed: 08/10/2023]
Abstract
Optical microscopes can have limited resolution due to aberrations caused by samples and sample holders. Using deformable mirrors and wavefront sensorless optimization algorithms can correct these aberrations, but the correction is limited to a small area of the field of view. This study presents an adaptive optics method that uses a series of plug-and-play deformable lenses for large field of view wavefront correction. A direct wavefront measurement method using the spinning sub-pupil aberration measurement technique is combined with correction based on the deformable lenses. Experimental results using fluorescence microscopy with a wide field and a light sheet fluorescence microscope show that the proposed method can achieve detection and correction over an extended field of view with a compact transmissive module placed in the detection path of the microscope. This method could improve the resolution and accuracy of imaging in a variety of fields, including biology and materials science.
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Affiliation(s)
- T Furieri
- Institute of Photonics and Nanotechnology, National Council of Research of Italy, Padova, Italy
- Department of Information Engineering, University of Padova, Padova, Italy
| | - A Bassi
- Department of Physics, Politecnico di Milano, Milan, Italy
| | - S Bonora
- Institute of Photonics and Nanotechnology, National Council of Research of Italy, Padova, Italy
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Tan M, Moss DJ. The laser trick that could put an ultraprecise optical clock on a chip. Nature 2023; 624:256-257. [PMID: 38092904 DOI: 10.1038/d41586-023-03782-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
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Andersson-Engels S, Andersen PE. Special Section on Selected Topics in Biophotonics: Translating Novel Photonics Technology into Clinical Applications. J Biomed Opt 2023; 28:121201. [PMID: 38074215 PMCID: PMC10704253 DOI: 10.1117/1.jbo.28.12.121201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
The editorial introduces the JBO Special Section on Selected Topics in Biophotonics: Translating Novel Photonics Technology into Clinical Applications.
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Affiliation(s)
- Stefan Andersson-Engels
- Tyndall National Institute, Cork, Ireland
- University College Cork, Department of Physics, Cork, Ireland
| | - Peter E Andersen
- Technical University of Denmark, Department of Health Technology, Kongens Lyngby, Denmark
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Yao P, Liu R, Broggini T, Thunemann M, Kleinfeld D. Construction and use of an adaptive optics two-photon microscope with direct wavefront sensing. Nat Protoc 2023; 18:3732-3766. [PMID: 37914781 PMCID: PMC11033548 DOI: 10.1038/s41596-023-00893-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Accepted: 07/24/2023] [Indexed: 11/03/2023]
Abstract
Two-photon microscopy, combined with the appropriate optical labelling, enables the measurement and tracking of submicrometer structures within brain cells, as well as the spatiotemporal mapping of spikes in individual neurons and of neurotransmitter release in individual synapses. Yet, the spatial resolution of two-photon microscopy rapidly degrades as imaging is attempted at depths of more than a few scattering lengths into tissue, i.e., below the superficial layers that constitute the top 300-400 µm of the neocortex. To obviate this limitation, we shape the focal volume, generated by the excitation beam, by modulating the incident wavefront via guidestar-assisted adaptive optics. Here, we describe the construction, calibration and operation of a two-photon microscope that incorporates adaptive optics to restore diffraction-limited resolution at depths close to 900 µm in the mouse cortex. Our setup detects a guidestar formed by the excitation of a red-shifted dye in blood serum, used to directly measure the wavefront. We incorporate predominantly commercially available optical, optomechanical, mechanical and electronic components, and supply computer-aided design models of other customized components. The resulting adaptive optics two-photon microscope is modular and allows for expanded imaging and optical excitation capabilities. We demonstrate our methodology in the mouse neocortex by imaging the morphology of somatostatin-expressing neurons that lie 700 µm beneath the pia, calcium dynamics of layer 5b projection neurons and thalamocortical glutamate transmission to L4 neurons. The protocol requires ~30 d to complete and is suitable for users with graduate-level expertise in optics.
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Affiliation(s)
- Pantong Yao
- Neurosciences Graduate Program, University of California San Diego, La Jolla, CA, USA
| | - Rui Liu
- Department of Physics, University of California San Diego, La Jolla, CA, USA
| | - Thomas Broggini
- Department of Physics, University of California San Diego, La Jolla, CA, USA
| | - Martin Thunemann
- Department of Biomedical Engineering, Boston University, Boston, MA, USA
| | - David Kleinfeld
- Neurosciences Graduate Program, University of California San Diego, La Jolla, CA, USA.
- Department of Physics, University of California San Diego, La Jolla, CA, USA.
- Department of Neurobiology, University of California San Diego, La Jolla, CA, USA.
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Lwowski C, Kohnen T. Prospective evaluation of the ESCRS online calculator for calculation of a multifocal intraocular lens. J Cataract Refract Surg 2023; 49:1209-1215. [PMID: 37635306 DOI: 10.1097/j.jcrs.0000000000001296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Accepted: 08/19/2023] [Indexed: 08/29/2023]
Abstract
PURPOSE To evaluate a recently introduced ESCRS online calculator for intraocular lens (IOL) calculation of a multifocal IOL in refractive lens exchange and cataract surgery in a prospective setting. SETTING Department of Ophthalmology, Goethe University Frankfurt, Germany. DESIGN Prospective, consecutive case series. METHODS Eyes that received lens extraction and multifocal IOL implantation were included. The mean prediction error, mean absolute error, and median absolute prediction error (MedAE) provided by the ESCRS online calculator were compared, as were the number of eyes within ±0.5 diopters (D), ±1.0 D, ±2.0 D of target refraction. The SRK/T formula was also included for comparison. Postoperative spherical equivalent was measured at 3 months. 1 eye per patient was included. RESULTS 88 eyes from 88 patients with a mean age of 62 ± 9.5 years were included. The MedAE was low for all formulas and ranged from 0.26 D (Kane), Hill-RBF (0.27 D), Hoffer Q Savini/Taroni (Hoffer QST) (0.27 D), Barrett Universal II (BUII) (0.28 D), Emmetropia Verifying Optical (EVO) (0.29 D), Cooke K6 (0.27 D), 0.30 D (Postoperative spherical Equivalent prediction using Artificial intelligence and Linear algorithms, by Debellemaniére, Gatinel, and Saad [Pearl DGS]) to 0.31 D (SRK/T). No statistically significant difference was found ( P = .627). Considering the number of eyes within ±0.5 D of the calculated refraction the best performing was again the Hill-RBF (84%, 74 eyes), again followed by Kane (71, 81%), EVO, Pearl DGS, Hoffer QST, BUII (each 80%, 70 eyes), Cooke K6 (78%, 69 eyes), and SRK/T (74%). Again, no statistically significant difference was found ( P = .39). CONCLUSIONS Using a recently introduced ESCRS online IOL calculator in multifocal IOLs leds to a high number of eyes reaching target refraction and low prediction errors. All formulas performed similarly well. Hill-RBF showed the highest number of eyes within ±0.5 D, but no significance was found.
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Affiliation(s)
- Christoph Lwowski
- From the Department of Ophthalmology, Goethe-University, Frankfurt am Main, Germany
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