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Hao Y, Fu J, Huang J, Chen D. Comparing the accuracy of intraocular lens power calculation formulas using artificial intelligence and traditional formulas in highly myopic patients: a meta-analysis. Int Ophthalmol 2024; 44:242. [PMID: 38904666 DOI: 10.1007/s10792-024-03227-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Accepted: 06/18/2024] [Indexed: 06/22/2024]
Abstract
PURPOSE The accuracy of intraocular lens (IOL) calculations is one of the key indicators for determining the success of cataract surgery. However, in highly myopic patients, the calculation errors are relatively larger than those in general patients. With the continuous development of artificial intelligence (AI) technology, there has also been a constant emergence of AI-related calculation formulas. The purpose of this investigation was to evaluate the accuracy of AI calculation formulas in calculating the power of IOL for highly myopic patients. METHODS We searched the relevant literature through August 2023 using three databases: PubMed, EMBASE, and the Cochrane Library. Six IOL calculation formulas were compared: Kane, Hill-RBF, EVO, Barrett II, Haigis, and SRK/T. The included metrics were the mean absolute error (MAE) and percentage of errors within ± 0.25 D, ± 0.50 D, and ± 1.00 D. RESULTS The results showed that the MAE of Kane was significantly lower than that of Barrett II (mean difference = - 0.03 D, P = 0.02), SRK/T (MD = - 0.08 D, P = 0.02), and Haigis (MD = - 0.12 D, P < 0.00001). The percentage refractive prediction errors for Kane at ± 0.25 D, ± 0.50 D, and ± 1.00 D were significantly greater than those for SRK/T (P = 0.007, 0.003, and 0.01, respectively) and Haigis (P = 0.009, 0.0001, and 0.001, respectively). No statistically significant differences were noted between Hill-RBF and Barret, but Hill-RBF was significantly better than SRK/T and Haigis. CONCLUSION The AI calculation formulas showed more accurate results compared with traditional formulas. Among them, Kane has the best performance in calculating IOL degrees for highly myopic patients.
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Affiliation(s)
- Yuxu Hao
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, No. 270, Xueyuan Road, Wenzhou, 325000, Zhejiang, China
| | - Jin Fu
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, No. 270, Xueyuan Road, Wenzhou, 325000, Zhejiang, China
| | - Jin Huang
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, No. 270, Xueyuan Road, Wenzhou, 325000, Zhejiang, China
| | - Ding Chen
- School of Ophthalmology and Optometry, Eye Hospital, Wenzhou Medical University, No. 270, Xueyuan Road, Wenzhou, 325000, Zhejiang, China.
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Yu J, Lin X, Huang X, Xu Z, Ning R, Li K, Savini G, Schiano-Lomoriello D, Zhou X, Huang J. Evaluation of a new dynamic real-time visualization 25 kHz swept-source optical coherence tomography based biometer. EYE AND VISION (LONDON, ENGLAND) 2024; 11:9. [PMID: 38433240 PMCID: PMC10910812 DOI: 10.1186/s40662-024-00377-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 02/10/2024] [Indexed: 03/05/2024]
Abstract
BACKGROUND To evaluate the intraobserver repeatability and interobserver reproducibility of a newly developed dynamic real-time visualization 25 kHz swept-source optical coherence tomography (SS-OCT) based biometer (ZW-30, TowardPi Medical Technology Ltd, China) and compare its agreement with another SS-OCT based biometer (IOLMaster 700, Carl Zeiss Meditec AG, Jena, Germany). METHODS Eighty-two healthy right eyes were enrolled in this prospective observational study. Measurements were repeated for three times using the ZW-30 and IOLMaster 700 in a random order. Obtained parameters included axial length (AL), central corneal thickness (CCT), aqueous depth (AQD), anterior chamber depth (ACD), lens thickness (LT), mean keratometry (Km), astigmatism magnitude (AST), vector J0, vector J45, and corneal diameter (CD). The within-subject standard deviation (Sw), test-retest (TRT) variability, coefficient of variation (CoV), and intraclass correlation coefficient (ICC) were adopted to assess the intraobserver repeatability and interobserver reproducibility. The double-angle plot was also used to display the distribution of AST. To estimate agreement, Bland-Altman plots were used. RESULTS For the intraobserver repeatability and interobserver reproducibility, the Sw, TRT and CoV for all parameters were low. Meanwhile, the ICC values were all close to 1.000, except for the J45 (ICC = 0.887 for the intraobserver repeatability). The double-angle plot showed that the distribution of AST measured by these two devices was similar. For agreement, the Bland-Altman plots showed narrow 95% limits of agreements (LoAs) for AL, CCT, AQD, ACD, LT, Km AST, J0, J45, and CD (- 0.02 mm to 0.02 mm, - 7.49 μm to 8.08 μm, - 0.07 mm to 0.04 mm, - 0.07 mm to 0.04 mm, - 0.07 mm to 0.08 mm, - 0.16 D to 0.30 D, - 0.30 D to 0.29 D, - 0.16 D to 0.16 D, - 0.23 D to 0.13 D, and - 0.39 mm to 0.10 mm, respectively). CONCLUSIONS The newly dynamic real-time visualization biometer exhibited excellent intraobserver repeatability and interobserver reproducibility. The two devices both based on the SS-OCT principle had similar ocular parameters measurement values and can be interchanged in clinical practice.
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Affiliation(s)
- Jinjin Yu
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, N No. 19 Baoqing Road, Xuhui District, Shanghai, 200031, China
- Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
- Ningbo No. 2 Hospital, Ningbo, Zhejiang, China
- NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
| | - Xuanqiao Lin
- Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xiaomin Huang
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, N No. 19 Baoqing Road, Xuhui District, Shanghai, 200031, China
- Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
| | - Zhenyu Xu
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, N No. 19 Baoqing Road, Xuhui District, Shanghai, 200031, China
- Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
| | - Rui Ning
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, N No. 19 Baoqing Road, Xuhui District, Shanghai, 200031, China
- Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
| | - Kexin Li
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, N No. 19 Baoqing Road, Xuhui District, Shanghai, 200031, China
- Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
- NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China
| | | | | | - Xingtao Zhou
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, N No. 19 Baoqing Road, Xuhui District, Shanghai, 200031, China.
- Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China.
- NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China.
| | - Jinhai Huang
- Eye Institute and Department of Ophthalmology, Eye & ENT Hospital, Fudan University, N No. 19 Baoqing Road, Xuhui District, Shanghai, 200031, China.
- Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China.
- NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, Shanghai, China.
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Stopyra W, Cooke DL, Grzybowski A. A Review of Intraocular Lens Power Calculation Formulas Based on Artificial Intelligence. J Clin Med 2024; 13:498. [PMID: 38256632 PMCID: PMC10816994 DOI: 10.3390/jcm13020498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 12/01/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
PURPOSE The proper selection of an intraocular lens power calculation formula is an essential aspect of cataract surgery. This study evaluated the accuracy of artificial intelligence-based formulas. DESIGN Systematic review. METHODS This review comprises articles evaluating the exactness of artificial intelligence-based formulas published from 2017 to July 2023. The papers were identified by a literature search of various databases (Pubmed/MEDLINE, Google Scholar, Crossref, Cochrane Library, Web of Science, and SciELO) using the terms "IOL formulas", "FullMonte", "Ladas", "Hill-RBF", "PEARL-DGS", "Kane", "Karmona", "Hoffer QST", and "Nallasamy". In total, 25 peer-reviewed articles in English with the maximum sample and the largest number of compared formulas were examined. RESULTS The scores of the mean absolute error and percentage of patients within ±0.5 D and ±1.0 D were used to estimate the exactness of the formulas. In most studies the Kane formula obtained the smallest mean absolute error and the highest percentage of patients within ±0.5 D and ±1.0 D. Second place was typically achieved by the PEARL DGS formula. The limitations of the studies were also discussed. CONCLUSIONS Kane seems to be the most accurate artificial intelligence-based formula. PEARL DGS also gives very good results. Hoffer QST, Karmona, and Nallasamy are the newest, and need further evaluation.
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Affiliation(s)
- Wiktor Stopyra
- MW-Med Eye Centre, 31-416 Krakow, Poland;
- Department of Medicine, University of Applied Sciences, 34-400 Nowy Targ, Poland
| | - David L. Cooke
- Great Lakes Eye Care, Saint Joseph, MI 49085, USA;
- Department of Neurology and Ophthalmology, College of Osteopathic Medicine, Michigan State University, East Lansing, MI 48824, USA
| | - Andrzej Grzybowski
- Institute for Research in Ophthalmology, Foundation for Ophthalmology Development, 61-553 Poznan, Poland
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Khorrami-Nejad M, Azizi E, Tarik FF, Akbari MR. Brown syndrome: a literature review. Ther Adv Ophthalmol 2024; 16:25158414231222118. [PMID: 38406627 PMCID: PMC10893837 DOI: 10.1177/25158414231222118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/04/2023] [Indexed: 02/27/2024] Open
Abstract
The current data on various aspects of Brown syndrome are limited and sporadic. This review provides a coherent and comprehensive review of basic features, etiology, classification, differential diagnosis, and different management strategies of patients with Brown syndrome. In this topical review, PubMed, Scopus, and Google Scholar search engines were searched for papers, published between 1950 and January 2023 based on the keywords of this article. The related articles were collected, summarized, categorized, assessed, concluded, and presented. Brown syndrome is identified by restricted passive and active elevation of the eye in adduction. The condition is divided into congenital and acquired causes. The clinical features result from a restricted motion of the superior oblique tendon sheath through the trochlea while trying to look up in adduction. The newest explanation of the underlying pathophysiology has been explained as the presence of a fibrotic strand in the superior oblique muscle tendon with variable insertion sites which creates various elevation deficits seen in Brown syndrome. The most common clinical features include the presence of an abnormal head posture, V-pattern strabismus, and hypotropia in the primary position. Management of Brown syndrome includes watchful observation, surgical, and non-surgical procedures. Some cases might resolve spontaneously without any intervention; however, some acquired cases might require systemic and/or intra-trochlear steroid administration to treat the underlying causes. Surgical procedures such as superior oblique tenectomy and using a silicon tendon expander are indicated in the presence of hypotropia and significant abnormal head posture in the primary position.
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Affiliation(s)
- Masoud Khorrami-Nejad
- Translational Ophthalmology Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Optometry Department, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
| | - Elham Azizi
- Number 6/10, Ferdowsi Street, Bojnourd, Iran
| | - Farah Fareed Tarik
- Optometry Department, School of Rehabilitation, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohamad Reza Akbari
- Translational Ophthalmology Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Stopyra W, Langenbucher A, Grzybowski A. Intraocular Lens Power Calculation Formulas-A Systematic Review. Ophthalmol Ther 2023; 12:2881-2902. [PMID: 37698825 PMCID: PMC10640516 DOI: 10.1007/s40123-023-00799-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 08/16/2023] [Indexed: 09/13/2023] Open
Abstract
PURPOSE The proper choice of an intraocular lens (IOL) power calculation formula is an important aspect of phacoemulsification. In this study, the formulas most commonly used today are described and their accuracy is evaluated. METHODS This review includes papers evaluating the accuracy of IOL power calculation formulas published during the period from January 2015 to December 2022. The articles were identified by a literature search of medical and other databases (PubMed/MEDLINE, Crossref, Web of Science, SciELO, Google Scholar, and Cochrane Library) using the terms "IOL formulas," "Barrett Universal II," "Kane," "Hill-RBF," "Olsen," "PEARL-DGS," "EVO," "Haigis," "SRK/T," and "Hoffer Q." Twenty-nine of the most recent peer-reviewed papers in English with the largest samples and largest number of formulas compared were considered. RESULTS Outcomes of mean absolute error and percentage of predictions within ±0.5 D and ±1.0 D were used to evaluate the accuracy of the formulas. In most studies, Barrett achieved the smallest mean absolute error and PEARL-DGS the highest percentage of patients with ±0.5 D in short eyes, while Kane obtained the highest percentage of patients with ±0.5 D in long eyes. CONCLUSIONS The third- and fourth-generation formulas are gradually being replaced by more accurate ones. The Barrett Universal II among vergence formulas and Kane and PEARL-DGS among artificial intelligence-based formulas are currently most often reported as the most precise.
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Affiliation(s)
| | - Achim Langenbucher
- Department of Experimental Ophthalmology, Saarland University, 66421, Homburg, Germany
| | - Andrzej Grzybowski
- Institute for Research in Ophthalmology, Foundation for Ophthalmology Development, 61-553, Poznan, Poland.
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Ni S, Nguyen TTP, Ng R, Woodward M, Ostmo S, Jia Y, Chiang MF, Huang D, Skalet AH, Campbell JP, Jian Y. Panretinal Optical Coherence Tomography. IEEE TRANSACTIONS ON MEDICAL IMAGING 2023; 42:3219-3228. [PMID: 37216244 PMCID: PMC10615839 DOI: 10.1109/tmi.2023.3278269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We introduce a new concept of panoramic retinal (panretinal) optical coherence tomography (OCT) imaging system with a 140° field of view (FOV). To achieve this unprecedented FOV, a contact imaging approach was used which enabled faster, more efficient, and quantitative retinal imaging with measurement of axial eye length. The utilization of the handheld panretinal OCT imaging system could allow earlier recognition of peripheral retinal disease and prevent permanent vision loss. In addition, adequate visualization of the peripheral retina has a great potential for better understanding disease mechanisms regarding the periphery. To the best of our knowledge, the panretinal OCT imaging system presented in this manuscript has the widest FOV among all the retina OCT imaging systems and offers significant values in both clinical ophthalmology and basic vision science.
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Abdi P, Atighehchian M, Farsiani AR. Comparison of corneal measurements using two different Scheimpflug analyzers in Sirius and Pentacam devices. Sci Rep 2023; 13:16956. [PMID: 37805659 PMCID: PMC10560234 DOI: 10.1038/s41598-023-44133-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 10/04/2023] [Indexed: 10/09/2023] Open
Abstract
The aim was to compare measurements of anterior segment biometry parameters using two Scheimpflug tomographies, Pentacam and Sirius to assess the agreement. Prospective cross-sectional observational study. A total of 60 eyes of 30 healthy subjects were included and evaluated with Pentacam followed by Sirius imaging. Corneal indices were performed with two modalities in both eyes including; apical corneal thickness (ACT), corneal thickness at pupil site(PCT), thinnest corneal thickness (TCT), anterior chamber depth (ACD), chamber angle, chamber volume, cornea volume, mean front keratometry (FKm), the radius of corneal curvature at the anterior and posterior surface in steep and flat meridian, anterior astigmatism values, pupil diameter, and horizontal corneal diameter. The Bland-Altman graph and ICC (intra-class correlation were used to establish an agreement and present the similarity of the findings. Most parameters showed perfect agreement. In both devices, the ICC was more than 0.91 in all measurements except for ACD (ICC = 0.820), cylinder axis (ICC = 0.520), TCT(ICC = 0.881), ACT(ICC = 0.672), PCT (ICC = 0.882), chamber angle (ICC = 0.362), pupil diameter(ICC = 0.137). Pentacam yielded higher values that were significant in five parameters including 3.47 μm for TCT, 4.29 µm for PCT, 10.03 mm3 for chamber volume,2.67 mm3 for cornea volume, and 1.49 mm for pupil diameter but there was only a statistically significant difference in cornea volume and pupil diameter (p-value < 0.001). However, in Pentacam only the chamber angle value was 6.44 mm3 lower than Sirius, with a statistically significant difference (p-value < 0.001). Although these two devices had some statistically different results, it seems that they have a good agreement and correlation in most parameters.
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Affiliation(s)
- Parisa Abdi
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Amir Reza Farsiani
- Department of Ophthalmology, School of Medicine, Zanjan University of Medical sciences, Zanjan, Iran
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Kuriakose RK, Gulati R, Bains H, Ramaprasad A, Chan NK, Basti S. Change in major ocular biometry parameters axial length and keratometry in adults over time. J Cataract Refract Surg 2023; 49:474-478. [PMID: 36700942 DOI: 10.1097/j.jcrs.0000000000001144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 01/11/2023] [Indexed: 01/27/2023]
Abstract
PURPOSE To determine how much axial length (AL) and average keratometry (K) change over time in elderly patients and to assess clinical necessity of repeating biometry in instances where the second eye is operated on 6 months or more after the first. SETTING Northwestern Memorial Hospital, Chicago, Illinois. DESIGN Retrospective study. METHODS Inclusion criteria were patients older than 35 years, with 2 biometry measurements over 6 months apart, measured with the IOL Master 700 from January 1, 2016, to September 15, 2020. Patients were excluded if they had any other intraocular surgery besides cataract. A linear mixed model and SPSS software was used to compare measurements among timepoints. RESULTS 201 patients (402 eyes) were included (average age 73.3, 59.3% female). Average time between biometry measurements was 21.5 months (range 6 to 48 months). The mean change in AL was 0.04 mm (95% CI, 0.03 to 0.05, P = .10). The mean change in K was 0.01 diopters (95% CI, -0.10 to 0.30, P = .33). At the 6-month to 1-year interval (n = 73), mean change in AL was 0.04 mm. Mean change in AL did not significantly increase with greater time intervals. There was no correlation between time and ΔAL ( P = .70), nor between time and ΔK ( P = .98). CONCLUSIONS In this cohort, biometric parameters did not change significantly over time. Repeating biometry at a 1- to 2-year interval for elderly patients receiving monofocal implants may offer limited benefit.
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Affiliation(s)
- Robin K Kuriakose
- From the Department of Ophthalmology, Northwestern University Feinberg School of Medicine, Chicago, Illinois (Kuriakose, Ramaprasad, Chan, Basti); Northwestern University Feinberg School of Medicine, Chicago, Illinois (Gulati); Texas Tech University Health Sciences Center, El Paso, Texas (Bains)
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Wang W, Jiang Y, Zhu Z, Zhang S, Xuan M, Chen Y, Xiong R, Bulloch G, Zeng J, Morgan IG, He M. Clinically Significant Axial Shortening in Myopic Children After Repeated Low-Level Red Light Therapy: A Retrospective Multicenter Analysis. Ophthalmol Ther 2023; 12:999-1011. [PMID: 36609829 PMCID: PMC10011348 DOI: 10.1007/s40123-022-00644-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 12/14/2022] [Indexed: 01/09/2023] Open
Abstract
INTRODUCTION Myopia is recognized as a progressive eye disease. The aim of this study was to evaluate the frequency and associated factors of clinically significant axial length (AL) shortening among myopic children following repeated low-level red light (RLRL) therapy. METHODS The clinical data that were collected for the myopic children aged 3-17 years who received an RLRL therapy delivered by home-use desktop light device that emitted light at 650 nm for at least 1 year, were reviewed. The clinical data included AL, spherical equivalent refraction (SER), and visual acuity measured at baseline and follow-up. The primary outcomes were frequency of AL shortening of > 0.05 mm, > 0.10 mm, and > 0.20 mm per year, and associated factors of AL shortening per year. RESULTS A total of 434 myopic children with at least 12 months of follow-up data were included. The mean age of participants was 9.7 (2.6) years with SER of -3.74 (2.60) diopters. There were 115 (26.50%), 76 (17.51%), and 20 (4.61%) children with AL shortening based on cutoffs of 0.05 mm/year, 0.10 mm/year, and 0.20 mm/year, respectively. In the multivariable model, AL shortening was significantly associated with older baseline age, female gender, and longer baseline AL or greater spherical equivalent refraction (all P < 0.05). Among AL shortened eyes, the mean AL difference (standard deviation, SD) was -0.142 (0.094) mm/year. Greater AL shortening was observed among children who were younger and had longer baseline AL (all P < 0.05). CONCLUSIONS More than a quarter of children had AL shortening > 0.05 mm following RLRL therapy, and the overall mean AL change was -0.142 mm/year. Further studies should explore the mechanisms underlying AL shortening.
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Affiliation(s)
- Wei Wang
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China
| | - Yu Jiang
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China
| | - Zhuoting Zhu
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China
| | - Shiran Zhang
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China
| | - Meng Xuan
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China
| | - Yanping Chen
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China
| | - Ruilin Xiong
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China
| | - Gabriella Bulloch
- Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, University of Melbourne, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3004, Australia
| | - Junwen Zeng
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China
| | - Ian G Morgan
- Research School of Biology, Australian National University, Canberra, Australia
| | - Mingguang He
- State Key Laboratory of Ophthalmology, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, 510060, China. .,Centre for Eye Research Australia, Royal Victorian Eye and Ear Hospital, University of Melbourne, Level 7, 32 Gisborne Street, East Melbourne, VIC, 3004, Australia. .,Ophthalmology, Department of Surgery, University of Melbourne, Melbourne, Australia.
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Kilian R, Crincoli E, Rizzo C, Ripa M, Faraldi F, Lavia C, Tartaro R, Ceruti P, Casini G, Rizzo S, Savastano A. Refractive error after combined phaco-vitrectomy: A multicentric study. Eur J Ophthalmol 2022; 33:11206721221143165. [PMID: 36503334 DOI: 10.1177/11206721221143165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
PURPOSE To study the post-operative refractive error (RE) of patients undergoing combined phaco-vitrectomy and to find out which intraocular lens (IOL)-power formula had the best refractive outcomes. METHODS In this retrospective multicentric study we compared the preoperative expected target with the postoperative RE of patients undergoing combined phaco-vitrectomy due to vitreomacular traction, macular pucker, full thickness macular hole or lamellar macular hole. A multinomial logistic regression was performed to compare the postoperative REs and the differences between expected and postoperative REs among the SRK-T, Olsen's and Holladay-2 formulas. The correlation between the difference in REs and IOL-power was also studied. RESULTS Sixty-seven eyes with a mean axial length of 23.73 ± 1.21 mm were included. Forty-two (63%), 14 (21%) and 11 (16%) eyes were implanted with an IOL that was calculated respectively with SRK-T, Olsen's and the Holladay-2 formula. The mean preoperative expected- and post-operative REs were -0.16 ± 0.12D and -0.48 ± 0.17, respectively (p = 0.045). SRK-T and Holladay-2 formulas led to a significant myopic shift whereas Olsen's caused a significant hyperopic error, independently from the IOL power. CONCLUSION Independently from the IOL power, none of the analyzed formulas is precise at calculating the post-operative RE.
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Affiliation(s)
- Raphael Kilian
- Ophthalmic Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Emanuele Crincoli
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
| | - Clara Rizzo
- Ophthalmic Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Matteo Ripa
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
| | | | - Carlo Lavia
- Surgical Department, Ophthalmology Service, Azienda Sanitaria Locale TO5, Chieri, Italy
| | - Ruggero Tartaro
- Department of NEUROFARBA, Ophthalmology, University of Florence, Careggi, Florence, Italy
| | - Piero Ceruti
- Ophthalmic Unit, Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Giamberto Casini
- Ophthalmology Unit, Department of Surgical, Medical, Molecular Pathology and Emergency, University of Pisa, Pisa, Italy
| | - Stanislao Rizzo
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
| | - Alfonso Savastano
- Ophthalmology Unit, "Fondazione Policlinico Universitario A. Gemelli IRCCS", Rome, Italy
- Catholic University of "Sacro Cuore", Rome, Italy
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11
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Yu J, Wen D, Zhao J, Wang Y, Feng K, Wan T, Savini G, McAlinden C, Lin X, Niu L, Chen S, Gao Q, Ning R, Jin Y, Zhou X, Huang J. Comprehensive comparisons of ocular biometry: A network-based big data analysis. EYE AND VISION (LONDON, ENGLAND) 2022; 10:1. [PMID: 36593481 PMCID: PMC9808957 DOI: 10.1186/s40662-022-00320-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 11/19/2022] [Indexed: 01/04/2023]
Abstract
PURPOSE To systematically compare and rank ocular measurements with optical and ultrasound biometers based on big data. METHODS PubMed, Embase, the Cochrane Library and the US trial registry ( www. CLINICALTRIAL gov ) were used to systematically search trials published up to October 22nd, 2020. We included comparative studies reporting the following parameters measured by at least two devices: axial length (AL), flattest meridian keratometry (Kf), steepest meridian keratometry (Ks), mean keratometry (Km), astigmatism (AST), astigmatism vectors J0 and J45, anterior chamber depth (ACD), aqueous depth (AQD), central corneal thickness (CCT), corneal diameter (CD) and lens thickness (LT). A network-based big data analysis was conducted using STATA version 13.1. RESULTS Across 129 studies involving 17,181 eyes, 12 optical biometers and two ultrasound biometers (with both contact and immersion techniques) were identified. A network meta-analysis for AL and ACD measurements found that statistically significant differences existed when contact ultrasound biometry was compared with the optical biometers. There were no statistically significant differences among the four swept-source optical coherence tomography (SS-OCT) based devices (IOLMaster 700, OA-2000, Argos and ANTERION). As for Ks, Km and CD, statistically significant differences were found when the Pentacam AXL was compared with the IOLMaster and IOLMaster 500. There were statistically significant differences for CCT when the OA-2000 was compared to Pentacam AXL, IOLMaster 700, Lenstar, AL-Scan and Galilei G6. CONCLUSION For AL and ACD, contact ultrasound biometry obtains the lower values compared with optical biometers. The Pentacam AXL achieves the lowest values for keratometry and CD. The smallest value for CCT measurement is found with the OA-2000.
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Affiliation(s)
- Jinjin Yu
- grid.506261.60000 0001 0706 7839Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, No. 19 Baoqing Road, Xuhui District, Shanghai, 200031 China
| | - Daizong Wen
- Quanzhou Aier Eye Hospital, Quanzhou, Fujian China
| | - Jing Zhao
- grid.506261.60000 0001 0706 7839Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, No. 19 Baoqing Road, Xuhui District, Shanghai, 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Yiran Wang
- grid.268099.c0000 0001 0348 3990Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang China
| | - Ke Feng
- grid.268099.c0000 0001 0348 3990Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang China
| | - Ting Wan
- grid.268099.c0000 0001 0348 3990Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang China
| | - Giacomo Savini
- grid.420180.f0000 0004 1796 1828IRCCS G.B. Bietti Foundation, Rome, Italy
| | - Colm McAlinden
- grid.419728.10000 0000 8959 0182Department of Ophthalmology, Singleton Hospital, Swansea Bay University Health Board, Swansea, UK
| | - Xuanqiao Lin
- grid.268099.c0000 0001 0348 3990Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang China
| | - Lingling Niu
- grid.506261.60000 0001 0706 7839Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, No. 19 Baoqing Road, Xuhui District, Shanghai, 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Sisi Chen
- grid.268099.c0000 0001 0348 3990Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang China
| | - Qingyi Gao
- grid.268099.c0000 0001 0348 3990Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang China
| | - Rui Ning
- grid.506261.60000 0001 0706 7839Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, No. 19 Baoqing Road, Xuhui District, Shanghai, 200031 China
| | - Yili Jin
- grid.268099.c0000 0001 0348 3990Eye Hospital and School of Ophthalmology and Optometry, Wenzhou Medical University, Wenzhou, Zhejiang China
| | - Xingtao Zhou
- grid.506261.60000 0001 0706 7839Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, No. 19 Baoqing Road, Xuhui District, Shanghai, 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
| | - Jinhai Huang
- grid.506261.60000 0001 0706 7839Eye Institute and Department of Ophthalmology, Institute for Medical and Engineering Innovation, Eye & ENT Hospital, Fudan University; NHC Key Laboratory of Myopia (Fudan University), Key Laboratory of Myopia, Chinese Academy of Medical Sciences, No. 19 Baoqing Road, Xuhui District, Shanghai, 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China
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Ye Y, Zhao Y, Han T, Zhang X, Miao H, Qin B, Zhou X. Accuracy of axial length, keratometry, and refractive measurement with Myopia Master in children with ametropia. BMC Ophthalmol 2022; 22:468. [PMID: 36463113 PMCID: PMC9719213 DOI: 10.1186/s12886-022-02672-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 11/07/2022] [Indexed: 12/04/2022] Open
Abstract
PURPOSE To evaluate the accuracy of axial length, keratometry, and refractive measurement with Myopia Master in ametropic children. METHODS In this randomized prospective cross-sectional study, 125 children with ametropia (250 eyes) were recruited (55 boys and 70 girls; age range: 3-15 years). All examinations were performed under full cycloplegic conditions. Measurements of axial length (AL), keratometry, and autorefraction acquired with the Myopia Master were compared with those from the IOLMaster 500, IOLMaster 700, Nidek ARK-1, and manifest refraction. The differences between the different methods were analyzed, and their correlation was assessed by interclass correlation coefficients (ICCs), Bland-Altman plot, and correlation test. RESULTS The ALs (mm) measured with Myopia Master, IOLMaster 500, and IOLMaster 700 were 23.67 ± 1.26, 23.68 ± 1.26, and 23.70 ± 1.25, respectively. The mean values and standard deviations for AL and keratometry readings from these devices were similar (P ≥ 0.059). The ICC analysis also revealed high consistency between the measurements (ICC ≥ 0.943). Additionally, the correlation coefficients were relatively high (r > 0.9, p < 0.001). Although the results of refraction obtained with the Myopia Master were slightly higher than those with manifest refraction (P ≤ 0.024), the agreement between these two measurements was excellent (ICC ≥ 0.858). The percentage of points outside the limits of agreements was < 5.22% in Bland-Altman plots for all analyses. CONCLUSIONS Myopia Master could be a highly efficient tool for clinical use as a three-in-one system (AL, keratometry, and refractive measurements) for screening in children with ametropia.
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Affiliation(s)
- Yuhao Ye
- grid.411079.a0000 0004 1757 8722Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China ,grid.506261.60000 0001 0706 7839NHC Key Laboratory of Myopia (Fudan University), Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, Shanghai 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China ,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Yu Zhao
- grid.411079.a0000 0004 1757 8722Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China ,grid.506261.60000 0001 0706 7839NHC Key Laboratory of Myopia (Fudan University), Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, Shanghai 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China ,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Tian Han
- grid.411079.a0000 0004 1757 8722Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China ,grid.506261.60000 0001 0706 7839NHC Key Laboratory of Myopia (Fudan University), Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, Shanghai 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China ,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Xiaoyu Zhang
- grid.411079.a0000 0004 1757 8722Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China ,grid.506261.60000 0001 0706 7839NHC Key Laboratory of Myopia (Fudan University), Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, Shanghai 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China ,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Huamao Miao
- grid.411079.a0000 0004 1757 8722Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China ,grid.506261.60000 0001 0706 7839NHC Key Laboratory of Myopia (Fudan University), Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, Shanghai 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China ,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Bing Qin
- grid.411079.a0000 0004 1757 8722Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China ,grid.506261.60000 0001 0706 7839NHC Key Laboratory of Myopia (Fudan University), Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, Shanghai 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China ,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
| | - Xingtao Zhou
- grid.411079.a0000 0004 1757 8722Department of Ophthalmology and Optometry, Eye and ENT Hospital of Fudan University, Shanghai, China ,grid.506261.60000 0001 0706 7839NHC Key Laboratory of Myopia (Fudan University), Laboratory of Myopia, Chinese Academy of Medical Sciences, 83 Fenyang Road, Shanghai, Shanghai 200031 China ,grid.411079.a0000 0004 1757 8722Shanghai Research Center of Ophthalmology and Optometry, Shanghai, China ,Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care (20DZ2255000), Shanghai, China
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de Andrade Ramos L, Seullner Brandão CV, Arce CG, Micheline L, Gordon Gandolfi M, Padovani C. Simulated keratometry and central corneal thickness measured in cats by autokeratometer, ultrasonic pachymeter, and Galilei G6™. Vet Ophthalmol 2022; 26:128-134. [PMID: 36383444 DOI: 10.1111/vop.13039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Revised: 11/01/2022] [Accepted: 11/02/2022] [Indexed: 11/17/2022]
Abstract
OBJECTIVE The aims of this study were to compare the central corneal thickness (CCT) measured by an ultrasonic pachymeter (SP-100, Tomey, Japão) versus the Galilei G6™ (Ziemer Ophthalmics System AG, Port, Switzerland) and to compare the simulated keratometry (SimK) measured by an autokeratometer (KM 500 Nidek) versus the Galilei G6™. ANIMAL STUDIED Eighteen mixed-breed cats, 10 males, and eight females, aged between 18 and 48 months, were evaluated (n = 36 eyes). PROCEDURE(S) The cats were manually restrained using a blanket. The operator held the autokeratometer close to the eye and measured the SimK. Next, one anesthetic eye drop was applied; the operator lightly touched the corneal using the ultrasound pachymeter and measured the CCT. At another moment, the cats were sedated using meperidine and xylazine and then evaluated using the Galilei. Student's t-test was employed to perform the statistical analyzes. RESULTS Considering the CCT, the ultrasound pachymeter provided mean ± SD of 623.03 ± 48.17 μm and the Galilei 617.34 ± 53.38 μm. The autokeratometer produced a SimK of 38.20 ± 0.84D (8.84 ± 0.20 mm) and the Galilei 38.37 ± 0.83D (8.80 ± 0.19 mm). The CCT and SimK did not differ statistically regardless of the device used. CONCLUSION To the best of the authors' knowledge, this is the first work to compare the CCT measured by the Galilei versus the ultrasonic pachymeter and to compare the SimK measured by the Galilei versus the keratometer in cats. No statistical difference was found considering the CCT and the SimK measured by the different devices.
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Affiliation(s)
- Leticia de Andrade Ramos
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science São Paulo State University ‐ UNESP São Paulo Brazil
| | - Cláudia Valéria Seullner Brandão
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science São Paulo State University ‐ UNESP São Paulo Brazil
| | - Carlos Guillermo Arce
- Contact Lens, Cornea, Refractive Surgery, Research & Technology Sectors Ophthalmologic Hospital and Eye Bank of Sorocaba São Paulo Brazil
| | - Laura Micheline
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science São Paulo State University ‐ UNESP São Paulo Brazil
| | - Micaella Gordon Gandolfi
- Department of Veterinary Surgery and Animal Reproduction, School of Veterinary Medicine and Animal Science São Paulo State University ‐ UNESP São Paulo Brazil
| | - Carlos Roberto Padovani
- Department of Biostatistics, Bioscience Institute São Paulo State University ‐ UNESP São Paulo Brazil
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Mrugacz M, Olszewski M, Pony-Uram M, Brymerski J, Bryl A. Assessment of the Refractive Error and Stabilisation of Refraction after Cataract Surgery in Relation to the Length of the Eyeball. J Clin Med 2022; 11:jcm11185447. [PMID: 36143091 PMCID: PMC9506347 DOI: 10.3390/jcm11185447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/06/2022] [Accepted: 09/13/2022] [Indexed: 11/20/2022] Open
Abstract
The aim of this study was to analyse the changes in refraction, depending on the length of the eyeball, in patients who had undergone cataract surgery using the phacoemulsification method and to assess the stability of refraction. A total of 90 patients (46 to 85 years of age) took part in the study and were divided into three groups: emmetropic, hypermetropic, and myopic. Two types of intraocular lenses were used: Bausch (Akreos AO) and Rayner (C-flex). In conclusion, stabilization of refraction was achieved in the third week in 91% of the emmetropic, 77% of the myopic, and 46% of the hypermetropic patients, respectively. The correct postoperative refraction was achieved using optical biometry and the Barrett Universal II formula to calculate the power of the lens implant.
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Affiliation(s)
- Małgorzata Mrugacz
- Department of Ophthalmology and Eye Rehabilitation, Medical University of Bialystok, Waszyngtona 17, 15-274 Bialystok, Poland
| | - Mateusz Olszewski
- Department of Ophthalmology, Subcarpathian Hospital in Krosno, Korczynska 57, 38-400 Krosno, Poland
| | - Magdalena Pony-Uram
- Department of Ophthalmology, Subcarpathian Hospital in Krosno, Korczynska 57, 38-400 Krosno, Poland
- Correspondence:
| | - Jacek Brymerski
- Department of Ophthalmology, Subcarpathian Hospital in Krosno, Korczynska 57, 38-400 Krosno, Poland
| | - Anna Bryl
- Department of Ophthalmology and Eye Rehabilitation, Medical University of Bialystok, Waszyngtona 17, 15-274 Bialystok, Poland
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15
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Clinical evaluation of ocular biometry of dual Scheimpflug analyzer, GALILEI G6 and swept source optical coherence tomography, ANTERION. Sci Rep 2022; 12:3602. [PMID: 35246594 PMCID: PMC8897498 DOI: 10.1038/s41598-022-07696-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 02/22/2022] [Indexed: 11/23/2022] Open
Abstract
To evaluate the performance of a new swept source optical coherence tomography optical biometer, ANTERION, in ocular biometry and intraocular lens (IOL) calculation compared with the reference standard of Dual Scheimpflug Analyzer (GALILEI, G6). A prospective comparative study was conducted in a tertiary eye center. Cataract patients were scanned with both devices in a random fashion, and parameters from the devices were analyzed in terms of mean difference and intraclass correlation coefficient (ICC). Bland–Altman plots were performed to compare agreement between the devices. Ninety-six eyes from 96 patients were enrolled for evaluation. With the exception of ACD, all parameters were significantly different, but excellent agreement was revealed for all of them. The mean difference in axial length was 0.03 mm, and ICC was 0.999. Calculated IOL power with Barrett formula revealed that 93.75% were within 1 diopter and the prediction error was 0.03 diopter. Biometry of the devices were arithmetically different. However, the mean difference of the key factors in IOL calculation were small and appeared to be negligible for the purposes of clinical application. The performance of ANTERION was comparable to that of G6 in biometric measurement and IOL calculation; however, the devices cannot be used interchangeably.
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16
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Dong J, Yao J, Chang S, Kanclerz P, Khoramnia R, Wang X. Comparison Study of the Two Biometers Based on Swept-Source Optical Coherence Tomography Technology. Diagnostics (Basel) 2022; 12:diagnostics12030598. [PMID: 35328151 PMCID: PMC8947380 DOI: 10.3390/diagnostics12030598] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/18/2022] [Accepted: 02/22/2022] [Indexed: 12/10/2022] Open
Abstract
This research aimed to investigate the potential differences in the parameters, including axial length (AL), central corneal thickness (CCT), anterior chamber depth (ACD), lens thickness (LT), flat keratometry (Kf), steep keratometry (Ks), mean keratometry (Km), astigmatism, white-to-white (WTW) distance, acquired rate, and intraocular lens (IOL) power, between the two swept-source optical coherence tomography (SS-OCT) biometers, the ANTERION (biometer A) and IOLMaster 700 (biometer B). In a prospective observational comparative case series study, we enrolled 198 eyes undergoing cataract surgery. The AL, CCT, ACD, LT, Kf, Ks, Km, astigmatism, WTW, acquired rate, and IOL power were assessed. McNemar tests compared the acquired rate, and the paired sample t-test compared the quantitative measurement results between the groups. Nineteen eyes were excluded owing to missing AL data for either biometer. Finally, data from 179 eyes were analyzed. Between the two devices, no significant difference was found in AL, astigmatism magnitude, J0, and J45, while significant differences existed in CCT, ACD, LT, Kf, Ks, Km, WTW, astigmatism axis, and IOL power; no statistical significance was found in the AL acquired rate (biometer A, 90.9% and biometer B, 93.9%). Approximately 65.4% of eyes demonstrated ≥0.5-D difference in IOL power between the two biometers. In conclusion, the two biometers showed significant differences in all measurements (CCT, ACD, LT, K, WTW, astigmatism axis, and IOL power), except for AL.
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Affiliation(s)
- Jing Dong
- Department of Ophthalmology, First Hospital of Shanxi Medical University, Taiyuan 030001, China;
| | - Jinhan Yao
- Department of Cataract, Shanxi Eye Hospital Affiliated to Shanxi Medical University, Taiyuan 030002, China; (J.Y.); (S.C.)
| | - Shuimiao Chang
- Department of Cataract, Shanxi Eye Hospital Affiliated to Shanxi Medical University, Taiyuan 030002, China; (J.Y.); (S.C.)
| | - Piotr Kanclerz
- Hygeia Clinic, 80-286 Gdańsk, Poland;
- Helsinki Retina Research Group, University of Helsinki, 00014 Helsinki, Finland
| | - Ramin Khoramnia
- The David J. Apple International Laboratory for Ocular Pathology, Department of Ophthalmology, University of Heidelberg, 69120 Heidelberg, Germany;
| | - Xiaogang Wang
- Department of Cataract, Shanxi Eye Hospital Affiliated to Shanxi Medical University, Taiyuan 030002, China; (J.Y.); (S.C.)
- Correspondence: ; Tel.: +86-13834246830; Fax: +86-0351-8231262
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Charlesworth E, Alderson AJ, Fylan F, Armstrong RA, Chandra A, Elliott DB. Investigating target refraction advice provided to cataract surgery patients by UK optometrists and ophthalmologists. Ophthalmic Physiol Opt 2022; 42:440-453. [PMID: 35179791 PMCID: PMC9306962 DOI: 10.1111/opo.12957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 01/04/2022] [Accepted: 01/04/2022] [Indexed: 11/27/2022]
Abstract
PURPOSE To determine whether UK optometrists and ophthalmologists provide target refraction advice to patients prior to cataract surgery, and when this should first be discussed. METHODS Optometrists and ophthalmologists were asked to complete a survey of two clinical vignettes (both older patients with cataract; a pre-operative myope who routinely read without glasses and a patient using a monovision approach), plus multiple choice and short answer questions either using hard copy or online. RESULTS Responses were obtained from 437 optometrists and 50 ophthalmologists. Optometrists who reported they would provide target refraction advice were more experienced (median 22 years) than those who would leave this to the Hospital Eye Service (median 10 years). The former group reported it was in the patients' best interest to make an informed decision as they had seen many myopic patients who read uncorrected pre-operatively, and were unhappy that they could no longer do so after surgery. Inexperienced optometrists reported that they did not want to overstep their authority and left the decision to the ophthalmologist. The ophthalmologists estimated their percentage of emmetropic target refractions over the last year to have been 90%. CONCLUSION Currently, some long-term myopes become dissatisfied after cataract surgery due to an emmetropic target refraction that leaves them unable to read without glasses as they did prior to surgery. Although experienced optometrists are aware of this and attempt to discuss this issue with patients, less experienced optometrists tend not to. This suggests that target refraction needs greater exposure in university training and continuing professional development. To provide patients with the knowledge to make informed decisions regarding their surgery, we suggest an agreed protocol within funded direct referral schemes of initial target refraction discussions by optometrists to introduce the idea of refractive outcomes and outline options, with further discussion with the ophthalmologist to clarify understanding.
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Affiliation(s)
- Emily Charlesworth
- Bradford School of Optometry and Vision Science, University of Bradford, Bradford, UK
| | - Alison J Alderson
- Bradford School of Optometry and Vision Science, University of Bradford, Bradford, UK
| | - Fiona Fylan
- Leeds Sustainability Institute, Leeds Beckett University, Leeds, UK
| | - Richard A Armstrong
- School of Optometry, College of Health and Life Sciences, Aston University, Birmingham, UK
| | - Aman Chandra
- Vision and Eye Research Institute, Anglia Ruskin University, Cambridge, UK
| | - David B Elliott
- Bradford School of Optometry and Vision Science, University of Bradford, Bradford, UK
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High speed, long range, deep penetration swept source OCT for structural and angiographic imaging of the anterior eye. Sci Rep 2022; 12:992. [PMID: 35046423 PMCID: PMC8770693 DOI: 10.1038/s41598-022-04784-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Accepted: 12/13/2021] [Indexed: 11/24/2022] Open
Abstract
This study reports the development of prototype swept-source optical coherence tomography (SS-OCT) technology for imaging the anterior eye. Advances in vertical-cavity surface-emitting laser (VCSEL) light sources, signal processing, optics and mechanical designs, enable a unique combination of high speed, long range, and deep penetration that addresses the challenges of anterior eye imaging. We demonstrate SS-OCT with a 325 kHz A-scan rate, 12.2 µm axial resolution (in air), and 15.5 mm depth range (in air) at 1310 nm wavelength. The ultrahigh 325 kHz A-scan rate not only facilitates biometry measurements by minimizing acquisition time and thus reducing motion, but also enables volumetric OCT for comprehensive structural analysis and OCT angiography (OCTA) for visualizing vasculature. The 15.5 mm (~ 11.6 mm in tissue) depth range spans all optical surfaces from the anterior cornea to the posterior lens capsule. The 1310 nm wavelength range enables structural OCT and OCTA deep in the sclera and through the iris. Achieving high speed and long range requires linearizing the VCSEL wavenumber sweep to efficiently utilize analog-to-digital conversion bandwidth. Dual channel recording of the OCT and calibration interferometer fringe signals, as well as sweep to sweep wavenumber compensation, is used to achieve invariant 12.2 µm (~ 9.1 µm in tissue) axial resolution and optimum point spread function throughout the depth range. Dynamic focusing using a tunable liquid lens extends the effective depth of field while preserving the lateral resolution. Improved optical and mechanical design, including parallax “split view” iris cameras and stable, ergonomic patient interface, facilitates accurate instrument positioning, reduces patient motion, and leads to improved imaging data yield and measurement accuracy. We present structural and angiographic OCT images of the anterior eye, demonstrating the unique imaging capabilities using representative scanning protocols which may be relevant to future research and clinical applications.
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19
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Refractive Outcomes after Cataract Surgery. Diagnostics (Basel) 2022; 12:diagnostics12020243. [PMID: 35204334 PMCID: PMC8870878 DOI: 10.3390/diagnostics12020243] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/14/2022] [Accepted: 01/15/2022] [Indexed: 01/19/2023] Open
Abstract
A post-operative manifest refractive error as close as possible to target is key when performing cataract surgery with intraocular lens (IOL) implantation, given that residual astigmatism and refractive errors negatively impact patients’ vision and satisfaction. This review explores refractive outcomes prior to modern biometry; advances in biometry and its impact on patients’ vision and refractive outcomes after cataract surgery; key factors that affect prediction accuracy; and residual refractive errors and the impact on visual outcomes. There are numerous pre-, intra-, and post-operative factors that can influence refractive outcomes after cataract surgery, leaving surgeons with a small “error budget” (i.e., the source and sum of all influencing factors). To mitigate these factors, precise measurement and correct application of ocular biometric data are required. With advances in optical biometry, prediction of patient post-operative refractory status has become more accurate, leading to an increased proportion of patients achieving their target refraction. Alongside improvements in biometry, advancements in microsurgical techniques, new IOL technologies, and enhancements to IOL power calculations have also positively impacted patients’ refractory status after cataract surgery.
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Stopyra W. THE EXACTNESS OF INTRAOCULAR LENS POWER CALCULATION FORMULAS FOR SHORT EYES AND CORRELATION BETWEEN METHOD ACCURACY AND EYEBALL AXIAL LENGTH. CESKA A SLOVENSKA OFTALMOLOGIE : CASOPIS CESKE OFTALMOLOGICKE SPOLECNOSTI A SLOVENSKE OFTALMOLOGICKE SPOLECNOSTI 2022; 78:236-240. [PMID: 36220363 DOI: 10.31348/2022/24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
PURPOSE To compare the accuracy of intraocular lens power calculation formulas and to examine the correlation of this exactness with the axial length for eyes shorter than 22.00 mm Methods: The data of hyperopic patients who underwent uneventful phacoemulsification between October 2015 and June 2019 were reviewed. The intraocular lens power for each patient was calculated using 6 formulas (Holladay1, SRK/T, Hoffer Q, Holladay 2, Haigis and Barrett Universal II) before cataract surgery. Postoperative refraction was measured, and refractive prediction error was calculated 3 months after phacoemulsification. The correlation between axial length and absolute error was evaluated. RESULTS Fifty-six patients (62 eyes) whose ocular axial length ranged between 20.58 mm and 21.97 mm were included in the study. The Hoffer Q formula achieved the lowest mean absolute error of 0.09 (±0.08 D). A significant correlation for the Hoffer Q (ρ = -0.329, p = 0.009) and the SRK/T (ρ = 0.321, p = 0.011) formula was observed. CONCLUSIONS 1. The Hoffer Q formula obtained the lowest absolute error and was recommended for intraocular lens power calculation for eyeballs with axial length shorter than 22.0 mm. 2. The correlation between axial length and absolute error is a factor which should be considered when calculating intraocular lens power.
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A-scan ultrasound in ophthalmology: A simulation tool. Med Eng Phys 2021; 97:18-24. [PMID: 34756334 DOI: 10.1016/j.medengphy.2021.09.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 09/14/2021] [Accepted: 09/17/2021] [Indexed: 11/22/2022]
Abstract
In the present study, we developed a computational tool for simulating the ophthalmological applications of A-scan ultrasound, including cataract characterisation and biometry. A-scan biometry is used to measure the axial length (AL) of the eye before cataract surgery to calculate the refractive power of the intraocular lens to be implanted. Errors in the measurement of the AL lead to post-surgical refractive errors. The simulation tool was developed using the k-Wave Matlab toolbox, together with a user-friendly interface developed in Matlab. Diverse error sources were evaluated. Constant ultrasound speed assumptions may introduce refractive errors of up to 0.6 D; by contrast, probe positioning errors had a lower impact, of up to 0.11 D. The correct identification of the Bruch's membrane is limited not only by axial resolution constraints but also by the low reflection coefficient at the retina/choroid interface. Regarding cataract characterisation, the amplitudes of the echoes reflected at the lens interfaces are sensitive to diverse cataract types and severities, and a more realistic representation could be obtained by using a higher resolution in the eye grid; however, the required computational times would make simulations impracticable when using personal computers. The simulation tool shows good versatility for evaluating diverse aspects of A-scan biometry.
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Gurlevik U, Yasar E. Evaluation of the agreement of optical biometry and Scheimpflug corneal topography with different axial lengths. J Fr Ophtalmol 2021; 44:1576-1583. [PMID: 34563406 DOI: 10.1016/j.jfo.2021.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 05/28/2021] [Accepted: 06/21/2021] [Indexed: 11/27/2022]
Abstract
PURPOSE To compare anterior segment parameters evaluated with optical low coherence reflectometry and combined Scheimpflug-Placido disc topography in eyes with different axial lengths. METHODS Deux cent quatre patients were divided into 3 groups according to their axial lengths. Central corneal thickness (CCT), anterior chamber depth (AD), mean keratometry value (K mean) and white-to-white distances (WTW) obtained from both devices were compared. All measurements were performed 3 times and averaged. RESULTS In group 1, a significant difference was detected between the two devices for CCT, WTW and Kmean measurements (P<0.001, P<0.001, p:0.005 respectively). In group 2, a significant difference was detected between the two devices for WTW measurement (P<0.001). In group 3, a significant difference was detected between the two devices for CCT and WTW measurement (P<0.001, P<0.001 respectively). In the Bland-Altman analysis, there was no match for Kmean obtained with both devices in group 1. In group 2, there was no agreement for AD obtained with both devices. In group 3, there was no match for AD, WTW or Kmean values obtained with both devices. CONCLUSION Some anterior segment parameters are not suitable for interchangeability in eyes with different axial lengths evaluated by Lenstar and Sirius anterior segment imaging systems. When planning critical surgery and treatment, more attention should be paid to measurements in eyes of different axial lengths.
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Affiliation(s)
- U Gurlevik
- Aksaray University Faculty of Medicine, Ophthalmology Department, Aksaray, Turkey.
| | - E Yasar
- Aksaray University Faculty of Medicine, Ophthalmology Department, Aksaray, Turkey
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Hovanesian JA, Berdy GJ, Epitropoulos A, Holladay JT. Effect of Cyclosporine 0.09% Treatment on Accuracy of Preoperative Biometry and Higher Order Aberrations in Dry Eye Patients Undergoing Cataract Surgery. Clin Ophthalmol 2021; 15:3679-3686. [PMID: 34511871 PMCID: PMC8420800 DOI: 10.2147/opth.s325659] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Accepted: 08/23/2021] [Indexed: 11/23/2022] Open
Abstract
Purpose To determine the effect of topical cyclosporine 0.09% on ocular surface regularity and the predictive accuracy of preoperative corneal power measurements in patients undergoing cataract surgery. Setting Private practice. Design Open-label, multicenter, prospective study. Methods Seventy-five patients (75 eyes) who presented for cataract surgery evaluation with signs of dry eye disease were prescribed topical cyclosporine 0.09% for 28 days BID. Corneal curvature measurements, slit lamp exam, and Standardized Patient Evaluation of Eye Dryness (SPEED) questionnaire were evaluated at the initial and follow-up visits. Cataract surgery occurred 1 to 3 weeks after the second biometry visit. Refraction and corrected distance visual acuity measurements were performed 1-month post-surgery. The primary outcome was the difference in absolute prediction error of 1-month spherical equivalent refractive outcome before and after cyclosporine treatment. Secondary outcomes included the effect of topical cyclosporine 0.09% on ocular surface irregularity. Results Sixty-four patients completed the study. The absolute prediction error of 1-month spherical equivalent refractive outcome was 0.39 ± 0.30 D vs 0.33 ± 0.25 D (P < 0.03) before and after treatment, respectively. The proportion of eyes that achieved the target refraction was greater based on measurements after topical cyclosporine 0.09% than would have occurred using pre-treatment measurements. Conclusion Cataract surgery patients with dry eye who are prescribed topical cyclosporine 0.09% BID for 28 days pre-surgery showed a statistically significant improvement in the prediction error of the spherical equivalent outcome of surgery. Other measures of dry eye severity showed significant improvements after treatment.
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Sun Y, Wei S, Li S, Cao K, Hu J, Yang X, Lin C, An W, Guo J, Li H, Fu J, Wang N. Distribution of ocular biometry in young Chinese eyes: The Anyang University Students Eye Study. Acta Ophthalmol 2021; 99:621-627. [PMID: 33326192 DOI: 10.1111/aos.14710] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 11/04/2020] [Accepted: 11/09/2020] [Indexed: 01/31/2023]
Abstract
PURPOSE To investigate the distribution of ocular biometric parameters and its association to refraction in university students in central China. METHODS Ocular biometric parameters including axial length (AL), central corneal thickness (CCT), keratometry power (K), anterior chamber depth (AQD) and lens thickness (LT) were measured by an optical biometry in a cohort of university students. Corneal radius of curvature (CR), lens position (LP), lens power (PBennett ), vitreous chamber depth (VCD) and AL to corneal radius ratio (AL/CR) were calculated. Cycloplegic refraction was measured using an autorefractor. RESULTS A total of 7650 undergraduate students participated in this study, with a mean age of 20.0 ± 1.4 years. The following ocular biometric parameters were measured: AL (24.78 ± 1.21 mm), CCT (539.83 ± 33.03 μm), AQD (3.23 ± 0.25 mm), LT (3.47 ± 0.18 mm), CR (7.79 ± 0.27 mm), LP (4.97 ± 0.23 mm), VCD (17.55 ± 1.15 mm), PBennett (25.00 ± 1.07 dioptres) and AL/CR (3.18 ± 0.15). Male subjects were found to have longer AL, thicker CCT, flatter CR, thinner lens, deeper AQD and VCD than female ones. Myopic subjects were found to have longer AL, thinner CCT, steeper CR, thinner and posterior lens, deeper AQD and VCD, lower PBennett and larger AL/CR than emmetropes and hyperopes. Spherical equivalent (SE) showed a negative correlation with AL/CR (r = -0.914), AL (r = -0.755) and VCD (r = -0.751). CONCLUSIONS This study provided a range of reference values for the main ocular biometric parameters in young adults and reported their distributions based on gender and refractive status. Our study indicates that SE has a strong correlation with AL/CR ratio, AL and VCD.
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Affiliation(s)
- Yunyun Sun
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
| | - Shifei Wei
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
| | - Shiming Li
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
| | - Kai Cao
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
- Beijing Institute of Ophthalmology Beijing China
| | - Jianping Hu
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
- Beijing Institute of Ophthalmology Beijing China
| | - Xiaohui Yang
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
- Beijing Institute of Ophthalmology Beijing China
| | - Caixia Lin
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
| | - Wenzai An
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
- Beijing Institute of Ophthalmology Beijing China
| | - Jiyuan Guo
- Anyang Eye Hospital Henan Province China
| | - He Li
- Anyang Eye Hospital Henan Province China
| | - Jing Fu
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
| | - Ningli Wang
- Beijing Ophthalmology & Visual Sciences Key Laboratory Beijing Tongren Eye Center Beijing Tongren Hospital Capital Medical University Beijing China
- Beijing Institute of Ophthalmology Beijing China
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Repeatability of biometry measured by three devices and its impact on predicted intraocular lens power. J Cataract Refract Surg 2021; 47:585-592. [PMID: 33252565 DOI: 10.1097/j.jcrs.0000000000000494] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 10/19/2020] [Indexed: 11/25/2022]
Abstract
PURPOSE To compare the repeatability of ocular biometry measured with the LENSTAR LS 900, IOLMaster 700, and Anterion and its impact on predicted intraocular lens (IOL) power. SETTING Tertiary eye-care facility in South India. DESIGN Prospective, observational, cross-sectional study. METHODS Eyes diagnosed with cataract had 3 consecutive scans on each biometers. The repeatability was assessed using the within-subject standard deviation (Sw), test-retest repeatability, and coefficient of variation (CoV). The agreement was evaluated with the intraclass correlation (ICC). The IOL power was calculated with the Barrett Universal II formula. RESULTS The study comprised 127 eyes of 76 patients. The repeatability of all parameters for a given device were excellent (ICC >0.9, low CoV and Sw). The agreement of the parameters between the biometers was very good (range from 0.93 to 0.99). The predicted IOL power differed statistically between the devices (P < .05), but the difference was clinically insignificant between the 3 biometers (ICC >0.99 for repeat calculation of IOL power). CONCLUSIONS All the biometers included in the study had good to excellent repeatability of biometry parameters. The agreement of the predicted IOL power was excellent between the 3 optical biometers.
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Comparison of keratometry data using handheld and table-mounted instruments in healthy adults. Int Ophthalmol 2021; 41:3451-3458. [PMID: 34109478 DOI: 10.1007/s10792-021-01909-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 05/25/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE To compare keratometry data between the handheld Retinomax K-plus 3 and the table-mounted IOLMaster 700. METHODS Healthy adult volunteers were prospectively recruited to the study. All participants underwent 3 consecutive keratometry measurements using the Retinomax K-plus 3 and a single biometry assessment using the IOLMaster 700. Differences between the Retinomax K-plus 3 and the IOLMaster 700 were assessed using Wilcoxon test for paired samples, Spearman correlation, Bland-Altman and mountain plots. RESULT Twenty-eight healthy subjects with a median age of 37 years (interquartile range (IQR) 28-44 years) were included in the study. The median mean keratometry (mean K) reading was higher using the Retinomax K-plus 3 (44.04D; IQR 42.96-45.61D) compared to the IOLMaster 700 (43.78D; IQR 43.22-44.90D, p < 0.01), with a mean difference of 0.18D (95% confidence interval (CI) 0.11-0.23D). Mean K readings were highly correlated between the 2 devices (r = 0.995, p < 0.01). Bland-Altman plots showed 95% limits of agreement between -0.14D and 0.49D. Frequency histogram of mean K reading differences between the Retinomax K-plus 3 and the IOLMaster 700 showed that 56% of cases were between ± 0.2D, 93% of cases were between ± 0.4D and all cases were between ± 0.5D. Mean corneal astigmatism measurement was higher using the Retinomax K-plus 3 (1.01 ± 0.40D) compared to the IOLMaster 700 (0.77 ± 0.36D), with a mean difference of 0.23 ± 0.37D (p < 0.01) between the devices. CONCLUSIONS A good agreement exists between the Retinomax K-plus 3 and the IOLMaster 700 regarding keratometry readings. This enables cataract surgeons to safely use the Retinomax K-plus 3 device when indicated.
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Al-Mohamedi H, Kelly-Pérez I, Oltrup T, Cayless A, Bende T. Extended measuring depth dual-wavelength Fourier domain optical coherence tomography. ACTA ACUST UNITED AC 2021; 66:557-562. [PMID: 34087968 DOI: 10.1515/bmt-2020-0350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 05/18/2021] [Indexed: 11/15/2022]
Abstract
In this work an enhanced wide range dual band spectral domain optical coherence tomography technique (SD-OCT) is presented to increase the depth and accuracy of the measurement of optical A-scan biometry. The setup uses a Michelson interferometer with two wide-spectrum Superluminescent Diodes (SLD). The emissions of the SLDs are filtered by a long-pass filter (900 nm) in front of the reference mirror. The light is spectrally decomposed using a single reflective diffraction grating (1,800 lines/mm) and the whole spectrum captured with two CCD line sensors. The capabilities of the system have been validated using a self-made human model eye.
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Affiliation(s)
- Haroun Al-Mohamedi
- Sektion für Experimentelle Ophthalmochirurgie, Universitätsklinikum Tübingen, Tübingen, Germany
| | - Ismael Kelly-Pérez
- Sektion für Experimentelle Ophthalmochirurgie, Universitätsklinikum Tübingen, Tübingen, Germany.,Department of Mechanical and Electrical Engineering, Universidad Veracruzana, Xalapa, Veracruz, Mexico
| | - Theo Oltrup
- Stiftungslabor für Grundlagen-forschung, Universitäts-Augenklinik Tübingen, Tübingen, Germany
| | - Alan Cayless
- Department of Physical Sciences, Open University, Milton Keynes, UK
| | - Thomas Bende
- Stiftungslabor für Grundlagen-forschung, Universitäts-Augenklinik Tübingen, Tübingen, Germany
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Boutillier G, Bernheim D, Denoyer A, Gabison E, Sitbon C, Hacquard M, Muraine M. Refractive accuracy and visual outcomes after combined descemet membrane endothelial keratoplasty and cataract surgery: A French multicentric study. J Fr Ophtalmol 2021; 44:792-798. [PMID: 34049717 DOI: 10.1016/j.jfo.2020.06.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 06/16/2020] [Accepted: 06/18/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE Descemet membrane endothelial keratoplasty (DMEK) combined with cataract extraction and intraocular lens insertion (new triple procedure) limits postoperative refractive errors. The objective of this study was to assess refractive accuracy after DMEK combined with cataract extraction and intraocular lens implantation. SETTING Four university hospitals (Rouen, Paris, Reims, Grenoble). DESIGN This retrospective multicenter study included patients with symptomatic corneal endothelial decompensation and cataract. METHODS The primary outcome was the difference between the target spherical equivalent and postoperative refraction at months 2 and 6. Secondary outcomes were visual acuity, keratometry, pachymetry and endothelial cell density. RESULTS A total of 130 eyes of 111 patients (mean age 66.2 years) were included (94% with Fuchs' endothelial dystrophy). For a mean refractive target set at -0.50 (±0.57) D, the mean (95% CI) refractive error was hyperopia of +0.49 (0.314; 0.664) D at 2 months and +0.46 (0.299; 0.619) D at 6 months. Best corrected distance visual acuity was improved in all patients: from 0.49 (±0.3) logMAR to 0.14 (±0.14) logMAR at 2 months and 0.05 (±0.1) logMAR at 6 months. Mean corneal thickness decreased from 621.6 (±37.6) μm to 515.2 (±42.6) μm at 2 months and 539.0 (±39.0) μm at 6 months. CONCLUSIONS Good refractive accuracy was obtained after the new triple procedure with DMEK. Hyperopic shift is common after triple procedures, and its persistence should be evaluated in future studies in order to anticipate a change in its value to optimize intraocular lens power calculation.
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Affiliation(s)
- G Boutillier
- Department of Ophthalmology, Rouen University Hospital, 1, Rue de Germont, 76031 Rouen cedex, France.
| | - D Bernheim
- Department of Ophthalmology, Grenoble University Hospital, Avenue Maquis du Grésivaudan, 38700 La Tronche, France
| | - A Denoyer
- Department of Ophthalmology, Reims University Hospital, Rue du Général Koenig, 51100, Reims, France
| | - E Gabison
- Department of Ophthalmology, Fondation Rothschild, Paris University Hospital, 44, Avenue Mathurin Moreau, 75019 Paris, France
| | - C Sitbon
- Department of Ophthalmology, Fondation Rothschild, Paris University Hospital, 44, Avenue Mathurin Moreau, 75019 Paris, France
| | - M Hacquard
- Department of Ophthalmology, Grenoble University Hospital, Avenue Maquis du Grésivaudan, 38700 La Tronche, France
| | - M Muraine
- Department of Ophthalmology, Rouen University Hospital, 1, Rue de Germont, 76031 Rouen cedex, France
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Recurring themes during cataract assessment and surgery. Eye (Lond) 2021; 35:2482-2498. [PMID: 33927353 DOI: 10.1038/s41433-021-01548-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 03/01/2021] [Accepted: 04/09/2021] [Indexed: 02/06/2023] Open
Abstract
The aim of this review was to discuss frequently encountered themes such as cataract surgery in presence of age-related macular degeneration (AMD), dementia, Immediate Sequential Bilateral Cataract Surgery (ISBCS), discussing non-standard intraocular lens (IOL) options during consultation in the National Health Services (NHS) and the choice of the biometric formulae based on axial length. Individual groups of authors worked independently on each topic. We found that cataract surgery does improve visual acuity in AMD patients but the need for cataract surgery should be individualised. In patients with dementia, cataract surgery should be considered 'sooner rather than later' as progression may prevent individuals presenting for surgery. This should be planned after discussion of patients' best interests with any carers; multifocal IOLs are not proven to be the best option in these patients. ISBCS gives comparable outcomes to delayed sequential surgeries with a low risk of bilateral endophthalmitis and it can be cost-saving and efficient. Patients are entitled to know all suitable IOL options that can improve their quality of life. Deliberately withholding this information or pressuring patients to choose a non-standard IOL is inappropriate. However, one should be mindful of the not spending inappropriate amounts of time discussing these in the NHS setting which may affect care of other NHS patients. Evidence suggests Hoffer Q, Haigis, Hill-RBF and Kane formulae for shorter eyes; Barrett Universal II (BU II), Holladay II, Haigis and Kane formulae for longer eyes and BU II, Hill-RBF and Kane formulae for medium axial length eyes.
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Molina‐martín A, Piñero DP, Caballero MT, Fez D, Camps VJ. Comparative analysis of anterior corneal curvature and astigmatism measurements obtained with three different devices. Clin Exp Optom 2021; 103:618-624. [DOI: 10.1111/cxo.13002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 09/04/2019] [Accepted: 10/09/2019] [Indexed: 11/28/2022] Open
Affiliation(s)
- Ainhoa Molina‐martín
- Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain,
| | - David P Piñero
- Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain,
- Department of Ophthalmology, Vithas Medimar International Hospital, Alicante, Spain,
| | - María T Caballero
- Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain,
| | - Dolores Fez
- Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain,
| | - Vicent J Camps
- Department of Optics, Pharmacology and Anatomy, University of Alicante, Alicante, Spain,
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Marcos S, Martinez-Enriquez E, Vinas M, de Castro A, Dorronsoro C, Bang SP, Yoon G, Artal P. Simulating Outcomes of Cataract Surgery: Important Advances in Ophthalmology. Annu Rev Biomed Eng 2021; 23:277-306. [PMID: 33848431 DOI: 10.1146/annurev-bioeng-082420-035827] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
As the human eye ages, the crystalline lens stiffens (presbyopia) and opacifies (cataract), requiring its replacement with an artificial lens [intraocular lens (IOL)]. Cataract surgery is the most frequently performed surgical procedure in the world. The increase in IOL designs has not been paralleled in practice by a sophistication in IOL selection methods, which rely on limited anatomical measurements of the eye and the surgeon's interpretation of the patient's needs and expectations. We propose that the future of IOL selection will be guided by 3D quantitative imaging of the crystalline lens to map lens opacities, anticipate IOL position, and develop fully customized eye models for ray-tracing-based IOL selection. Conversely, visual simulators (in which IOL designs are programmed in active elements) allow patients to experience prospective vision before surgery and to make more informed decisions about which IOL to choose. Quantitative imaging and optical and visual simulations of postsurgery outcomes will allow optimal treatments to be selected for a patient undergoing modern cataract surgery.
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Affiliation(s)
- Susana Marcos
- Instituto de Óptica "Daza de Valdés," Consejo Superior de Investigaciones Científicas (IO-CSIC), Madrid 28006, Spain;
| | - Eduardo Martinez-Enriquez
- Instituto de Óptica "Daza de Valdés," Consejo Superior de Investigaciones Científicas (IO-CSIC), Madrid 28006, Spain;
| | - Maria Vinas
- Instituto de Óptica "Daza de Valdés," Consejo Superior de Investigaciones Científicas (IO-CSIC), Madrid 28006, Spain;
| | - Alberto de Castro
- Instituto de Óptica "Daza de Valdés," Consejo Superior de Investigaciones Científicas (IO-CSIC), Madrid 28006, Spain;
| | - Carlos Dorronsoro
- Instituto de Óptica "Daza de Valdés," Consejo Superior de Investigaciones Científicas (IO-CSIC), Madrid 28006, Spain; .,2EyesVision, Madrid 28760, Spain
| | - Seung Pil Bang
- Flaum Eye Institute, The Institute of Optics, Center for Visual Science, Department of Biomedical Engineering, University of Rochester, Rochester, New York 14632, USA
| | - Geunyoung Yoon
- Flaum Eye Institute, The Institute of Optics, Center for Visual Science, Department of Biomedical Engineering, University of Rochester, Rochester, New York 14632, USA
| | - Pablo Artal
- Laboratorio de Óptica, Universidad de Murcia, Murcia 30100, Spain
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Ramin S, Nabovati P, Hashemi H, Abbasi A, Yekta A, Rafatifard A, Heydarian S, Khabazkhoob M. To compare on-axis measurements of the axial length with off-axis measurements in the paracentral horizontal and vertical positions. Semin Ophthalmol 2021; 37:63-66. [PMID: 33818277 DOI: 10.1080/08820538.2021.1910318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Purpose: To compare on-axis measurements of the axial length (AL) with off-axis measurements in the paracentral horizontal and vertical positions using the Lenstar LS 900 biometer.Methods: In this, the samples were selected from patients scheduled for cataract surgery using a systematic randomization method. After applying the exclusion criteria, all subjects underwent optometric examinations and AL measurement using the Lenstar. Five consecutive, non-cycloplegic measurements were done on the right eye centrally, 10° temporally, 10° nasally, 10° superiorly and 10° inferiorly on the retina by the same examiner.Results: Two hundred and seven eyes were examined in this study, of which 126 (60%) were for female patients. The mean age of the participants was 64.32 ± 10.77 years (range: 34-91 years). The mean central, superior, inferior, temporal, and nasal axial AL was 23.22 ± 1.02, 23.21 ± 1.02, 23.21 ± 1.02, 23.21 ± 1.02, 23.20 ± 1.03, respectively. Comparison of these readings using repeated measures ANOVA showed a statistically significant difference in the AL value among these positions. According to the post-hoc results, superior and nasal AL was statistically significantly lower compared to the central AL.Conclusion: If on-axis biometry is not available, AL can be measured in an off-axis manner in the paracentral temporal, superior and inferior positions. Considering the marked difference in AL measurement between central and nasal positions, off-axis measurement is not recommended in the nasal part because it may be associated with a marked hyperopic shift after cataract surgery.
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Affiliation(s)
- Shahroukh Ramin
- Department of Optometry, Faculty of Rehabilitation Science, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Payam Nabovati
- Rehabilitation Research Center, Department of Optometry, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Hassan Hashemi
- Noor Research Center for Ophthalmic Epidemiology, Noor Eye Hospital, Tehran, Iran
| | - Ali Abbasi
- NanoBaran Lab, Incubation Center for Pharmaceutical Technology (ICPT), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbasali Yekta
- Refractive Errors Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Alireza Rafatifard
- Faculty of Rehabilitation Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Samira Heydarian
- Department of Rehabilitation Science, School of Allied Medical Sciences, Mazandaran University of Medical Sciences, Sari, Iran
| | - Mehdi Khabazkhoob
- Department of Basic Sciences, School of Nursing and Midwifery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Rosa N, Zeppa L, De Bernardo M, Coppola A, Zeppa L, Borrelli M. Intraocular Lens Power Calculation Without Corneal Parameters: A New Option. Eye Contact Lens 2021; 47:208-212. [PMID: 32472776 DOI: 10.1097/icl.0000000000000719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/14/2020] [Indexed: 11/25/2022]
Abstract
OBJECTIVES To compare different methods in calculating the corneal radius (R) to be used in case of intraocular lens power calculations when it is immeasurable. METHODS The right eyes of 1,960 patients were randomly divided into 2 equal groups. The first group of right eyes (group A) was divided in three groups according to the axial length (AL) (≤21.99 mm, between 22 and 24.99 mm, and ≥25 mm). In these groups, the correlation between the AL and the corneal radius (R) provided three different regression formulas. The second group of right eyes (group B) was used to test the following methods of estimating the R: the regression formulas determined from group A, formula from Logan et al., formula from Stenström, the mean R calculated from group A, and the fellow eye group B. A Student paired T test was used for the statistical evaluation. RESULTS In case of AL≤21.99, the best results have been obtained with the fellow eye R, followed by either the regression formula or the mean R from group A (mean=0.00±0.09 mm, P=0.94, mean=0.05±0.21 mm, P=0.05, mean=0.05±0.22 mm, P=0.08, respectively). In case of AL between 22 and 24.99 mm, the best results have been obtained with the fellow eye R, followed by either the regression formula or the mean R from group A (mean=-0.01±0.09 mm, P=0.38, mean=0.01±0.21 mm, P=0.12, mean=0.01±0.24 mm, P=0.18, respectively). In case of AL≥25 mm, the best results have been obtained with the fellow eye R, followed by either the regression formula or the mean R from group A (mean=-0.003±0.08 mm, P=0.94 mean=-0.004±0.25 mm, P=0.85, mean=-0.004±0.25 mm, P=0.85, respectively). CONCLUSIONS The new calculated regression formulas seem to represent a reliable method to calculate the R when it is undetectable, as in case of corneal dystrophies.
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Affiliation(s)
- Nicola Rosa
- Department of Medicine and Surgery (N.R., M.D.B., A.C.), University of Salerno, Salerno, Italy ; Ophthalmology Unit, San Giuseppe Moscati Hospital (Lucio Zeppa, Lucia Zeppa), Avellino, Italy ; and Department of Ophthalmology (M.B.), Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
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Orbscan 3 Versus Pentacam HR: Evaluating the Possible Interchangeable Use of Various Parameters. Cornea 2021; 39:649-653. [PMID: 31990846 DOI: 10.1097/ico.0000000000002257] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE Many topography/tomography devices are available, and their interchangeable use is frequently questioned. This study aimed to compare the analogous indices of Orbscan 3 and Pentacam HR to detect whether the interchangeable use of the 2 devices is feasible. METHODS This retrospective study was conducted at Eye World Hospital, Giza, Egypt. Displays of Orbscan 3 (Bausch & Lomb; Technolas Perfect Vision GmbH) and Pentacam HR (Oculus Optikegrate) for 660 healthy right eyes were explored for various analogous indices. Bland-Altman plots with 95% limits of agreement (LoA) were used for comparisons. RESULTS The highest systematic error and lowest agreement existed in the front and back elevations from the best fit sphere (mean differences of 4.7 and 9.2 μm, respectively, and 95% LoA of -2.5 to 12.0 and -10.0 to 28.6, respectively). There was a relatively wide 95% LoA for each pachymetry at the corneal apex (-18 to 22 μm) and at the thinnest location (-22 to 22 μm), anterior chamber depth (-0.88 to 0.95 mm), flattest keratometry (-0.44 to 0.62 D), and steepest keratometry (-0.71 to 0.89 D). By contrast, the lowest systematic error and highest agreement existed for front and back best fit sphere radii of curvature (mean difference of 0.08 mm and 95% LoA of -0.08 to 0.24 and mean difference of 0.03 mm and 95% LoA of -0.17 to 0.23, respectively). CONCLUSIONS This study negates the accuracy of the use of devices interchangeably regarding most parameters. Therefore, examinations with the 2 devices should not be regarded comparable.
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Perez-Sanchez LI, Gutierrez-Vazquez J, Satrustegui-Lapetra M, Ferreira-Manuel F, Arevalo-Manso JJ, Gomez-Herrera JJ, Criado-Alvarez JJ. Ocular biometry through fully refocused steady-state magnetic resonance imaging sequence: reliability and agreement with the IOLMaster ® 500. Int Ophthalmol 2021; 41:1863-1874. [PMID: 33619690 DOI: 10.1007/s10792-021-01748-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 02/06/2021] [Indexed: 11/24/2022]
Abstract
PURPOSE To evaluate the reliability and agreement between Fully Refocused Steady-State magnetic resonance sequences (FRSS) and the IOLMaster® 500 optical biometer for measuring anterior chamber depth (ACD) and axial length (AL). METHODS In a sample of 32 healthy volunteers, separate observers measured the ACD and AL of both eyes using both techniques (inter-method) and through repeated FRSS measurements (interobserver) and by the same observer (intraobserver). We employed the Bland-Altman method to determine the agreement between FRSS and partial coherence interferometry (using the IOLMaster®) and the interobserver and intraobserver variability, providing the limits of agreement (LoA, or mean difference ± 1.96 SD). Correlation coefficients and intraclass correlation coefficients were also provided. RESULTS For ACD measurements with FRSS in pseudo-color scale, we obtained an LoA of 0.016 ± 0.266 mm compared with partial coherence interferometry. For AL with FRSS in greyscale, the LoA was 0.019 ± 0.383 mm. Maximum interobserver variability showed a - 0.036 ± 0.247 mm LoA for ACD with FRSS in pseudo-color scale. Maximum intraobserver variability was 0.000 ± 0.157 mm LoA for AL with FRSS in greyscale. CONCLUSIONS ACD and AL measurements using FRSS sequencing present high LoA and reliability when compared with partial coherence interferometry using the IOLMaster® 500. The results were better for FRSS in pseudo-color scale in ACD determination and for FRSS in greyscale in AL determination. FRSS would not be recommended for IOL power calculation due to variability of AL measurement.
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Affiliation(s)
- Lorenzo Ismael Perez-Sanchez
- Department of Radiology, Complejo Asistencial de Segovia, C/Luis Erik Clavería Neurólogo, s/n, 40002, Segovia, Spain.
| | - Julia Gutierrez-Vazquez
- Department of Radiology, Complejo Asistencial de Segovia, C/Luis Erik Clavería Neurólogo, s/n, 40002, Segovia, Spain
| | | | - Francisco Ferreira-Manuel
- Department of Radiology, Complejo Asistencial de Segovia, C/Luis Erik Clavería Neurólogo, s/n, 40002, Segovia, Spain
| | | | - Juan Jesus Gomez-Herrera
- Department of Radiology, Complejo Asistencial de Segovia, C/Luis Erik Clavería Neurólogo, s/n, 40002, Segovia, Spain
| | - Juan Jose Criado-Alvarez
- Talavera de La Reina Integrated Healthcare Area, Servicio de Salud de Castilla La Mancha, Talavera de La Reina, Toledo, Spain.,Department of Medical Sciences, School of Health Science, Universidad de Castilla La Mancha, Talavera de La Reina, Toledo, Spain
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Miele A, Fumagalli C, Abbruzzese G, Savastano A, Rizzo S, Giansanti F, Virgili G. Biometric refractive error after cataract and retina surgery: a systematic review and a benchmark proposal. Eye (Lond) 2021; 35:3049-3055. [PMID: 33420421 DOI: 10.1038/s41433-020-01381-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 11/25/2020] [Accepted: 12/18/2020] [Indexed: 11/09/2022] Open
Abstract
PURPOSE To systematically review studies on refractive error after phacovitrectomy and phacoemulsification and to investigate factors associated with larger error. MATERIALS AND METHODS A literature search was performed using PUBMED and EMBASE until May 2020. The articles were included in the study if they reported data about refractive error as the difference in spherical equivalent between actual vs. target refraction in patients who underwent phacovitrectomy and phacoemulsification according to the type of biometry (ultrasound or optical). An inverse variance meta-analysis technique was used to pool errors; standard deviations (SDs), which are an expression of random error, were reported descriptively as median and range of the 95% coefficient of reproducibility (95% CR: 1.96 SD). RESULTS Twenty-one studies (197,353 eyes) were included. The mean error obtained using optical biometry was negligible for phacoemulsification (0.04 D, 95% CI: -0.04 to 0.12; 8 studies, 587 eyes) and was consistent with larger datasets using mixed biometric methods (0.02, 95% CI -0.07 to 0.04; 5 studies, 194,522 eyes). A trend towards hyperopia was found with ultrasound biometry after phacoemulsification (+0.21 D, 0.00-0.42 D; 7 studies, 394 eyes). Mean error after phacovitrectomy was clinically insignificant with optical biometry (-0.10 D, -0.22 to 0.02;, 8 studies, 453 eyes), and) and a mild myopic shift was possible with ultrasound biometry (-0.39 D, 95% CI: -0.68 to -0.09 D; 6 studies, 529 eyes). The 95% CR was greater and more variable with ultrasound biometry in patients who underwent phacovitrectomy (median 1.75 D, range 0.47-2.5) while it was consistent and lower with optical biometry in patients who underwent phacoemulsification (median 0.96 D, range 0.60-1.2]). CONCLUSIONS Phacovitrectomy causes a mild myopic shift compared to phacoemulsification, which is clinically relevant only with ultrasound biometry. Furthermore, our review provides estimates of fixed and random error for postoperative vs. target spherical equivalent as a continuous variable, that is easy to use as benchmark for quality assurance.
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Affiliation(s)
- Alba Miele
- Ophthalmology Clinic, Department of Neurosciences, Psychology, Drug Research and Child Health (NEUROFARBA), University of Firenze and AOU Careggi, Firenze, Italy.
| | - Carlo Fumagalli
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Giacomo Abbruzzese
- Ophthalmology Clinic, Department of Neurosciences, Psychology, Drug Research and Child Health (NEUROFARBA), University of Firenze and AOU Careggi, Firenze, Italy
| | - Alfonso Savastano
- Ophthalmology Clinic, Department of Neurosciences, Psychology, Drug Research and Child Health (NEUROFARBA), University of Firenze and AOU Careggi, Firenze, Italy
| | - Stanislao Rizzo
- Ophthalmology Clinic, Department of Neurosciences, Psychology, Drug Research and Child Health (NEUROFARBA), University of Firenze and AOU Careggi, Firenze, Italy
| | - Fabrizio Giansanti
- Ophthalmology Clinic, Department of Neurosciences, Psychology, Drug Research and Child Health (NEUROFARBA), University of Firenze and AOU Careggi, Firenze, Italy
| | - Gianni Virgili
- Ophthalmology Clinic, Department of Neurosciences, Psychology, Drug Research and Child Health (NEUROFARBA), University of Firenze and AOU Careggi, Firenze, Italy
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Hovanesian J, Epitropoulos A, Donnenfeld ED, Holladay JT. The Effect of Lifitegrast on Refractive Accuracy and Symptoms in Dry Eye Patients Undergoing Cataract Surgery. Clin Ophthalmol 2020; 14:2709-2716. [PMID: 32982163 PMCID: PMC7502384 DOI: 10.2147/opth.s264520] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Accepted: 09/03/2020] [Indexed: 01/31/2023] Open
Abstract
Purpose To determine the effect of lifitegrast ophthalmic solution 5% on improving the tear film, biometry/keratometry, and refractive accuracy for dry eye patients scheduled for cataract surgery. Patients and Methods Multicenter, prospective, open-label study of 100 eyes of 100 patients undergoing cataract surgery who had a confirmed diagnosis of dry eye. Patients underwent biometry at baseline and again after a 28-day course of lifitegrast 5% BID. Primary outcome was an improvement in the accuracy of preoperative anterior corneal power measurements at predicting postoperative spherical equivalent (SE) pre- and post-lifitegrast treatment. Secondary outcomes included changes in dry eye symptoms and corneal staining. Results The accuracy of the biometry readings for the achieved refractive SE: within 0.25 D in 47% and 50% of eyes before and after the initial lifitegrast treatment, respectively; within 0.5 D in 71% and 79% of eyes before and after the initial lifitegrast treatment; and within 0.75 D in 81% and 91% of eyes before and after the initial lifitegrast treatment (p < 0.04). Conclusion Lifitegrast 5% significantly improved preoperative corneal surface measurement accuracy in patients with confirmed dry eye who were scheduled for cataract surgery. ![]()
Point your SmartPhone at the code above. If you have a QR code reader the video abstract will appear. Or use: https://youtu.be/uSDGfO8JGAc
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Choi HS, Yoo HS, An Y, Yoon SY, Park SP, Kim YK. Inter-ocular and inter-visit differences in ocular biometry and refractive outcomes after cataract surgery. Sci Rep 2020; 10:14673. [PMID: 32895416 PMCID: PMC7477095 DOI: 10.1038/s41598-020-71545-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 08/18/2020] [Indexed: 11/23/2022] Open
Abstract
This study aimed to determine whether inter-ocular differences in axial length (AL), corneal power (K), and adjusted emmetropic intraocular lens power (EIOLP) and inter-visit differences in these ocular biometric values, measured on different days, are related to refractive outcomes after cataract surgery. We retrospectively reviewed 279 patients who underwent phacoemulsification. Patients underwent ocular biometry twice (1–4 weeks before and on the day of surgery). Patients were divided into three groups: group S (similar inter-ocular biometry in different measurements; n = 201), group P (inter-ocular differences persisted in the second measurement; n = 37), and group D (inter-ocular difference diminished in the second measurement; n = 41). Postoperative refractive outcomes (mean absolute errors [MAEs]) were compared among the groups. Postoperative MAE2, based on second measurement with reduced inter-ocular biometry difference, was smaller than that calculated using the first measurement (MAE1) with borderline significance in group D (MAE1, 0.49 ± 0.45 diopters vs. MAE2, 0.41 ± 0.33 diopters, p = 0.062). Postoperative MAE2 was greater in group P compared to the other two groups (p = 0.034). Large inter-ocular biometry differences were associated with poor refractive outcomes after cataract surgery. These results indicate that measurements with smaller inter-ocular differences were associated with better refractive outcomes in cases with inter-visit biometry differences.
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Affiliation(s)
- Hyun Sup Choi
- Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seongan-ro 150, Kangdong-gu, Seoul, 05355, South Korea
| | - Hyo Soon Yoo
- Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seongan-ro 150, Kangdong-gu, Seoul, 05355, South Korea
| | - Yerim An
- Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seongan-ro 150, Kangdong-gu, Seoul, 05355, South Korea
| | - Sam Young Yoon
- Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seongan-ro 150, Kangdong-gu, Seoul, 05355, South Korea
| | - Sung Pyo Park
- Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seongan-ro 150, Kangdong-gu, Seoul, 05355, South Korea.
| | - Yong-Kyu Kim
- Department of Ophthalmology, Kangdong Sacred Heart Hospital, Hallym University College of Medicine, Seongan-ro 150, Kangdong-gu, Seoul, 05355, South Korea.
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Helmy YA, Dahab AA, Abdelhakim MA, Khattab AM, Hamza HS. Vitrectomy and silicone oil tamponade with and without phacoemulsification in the management of rhegmatogenous retinal detachment: A comparative study. AFRICAN VISION AND EYE HEALTH 2020. [DOI: 10.4102/aveh.v79i1.546] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Li X, Zhou Y, Young CA, Chen A, Jin G, Zheng D. Comparison of a new anterior segment optical coherence tomography and Oculus Pentacam for measurement of anterior chamber depth and corneal thickness. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:857. [PMID: 32793701 DOI: 10.21037/atm-20-187] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Background Accurate measurements of anterior chamber depth (ACD) and regional corneal thickness are especially important for the diagnosis and treatment of many ocular disease. This study aimed to evaluate the repeatability and reliability of a new swept source anterior segment optical coherence tomography (AS-OCT) and its agreement with Oculus Pentacam for measurements of ACD and corneal thickness (CT). Methods The central corneal thickness (CCT), superior corneal thickness (SCT), inferior corneal thickness (ICT), nasal corneal thickness (NCT), temporal corneal thickness (TCT) and ACD of the right eye from forty-nine adults aged 18 to 36 years (24.78±4.36 years old) were measured with Pentacam and AS-OCT (CASIA2). All subjects were measured twice with each device. The repeatability was determined using the coefficient of repeatability (COR), the relative COR and the limits of agreement (LOA). Bland-Altman plot was also used for evaluating the agreement between parameters from the two devices. Results For the repeatability of CASIA2, the COR of the two measurements of ACD, CCT, SCT, ICT, NCT and TCT was 0.31 mm, 18.58, 25.83, 28.32, 26.71 and 22.09 µm respectively. There were no statistically significant differences between the CT and ACD measurements by CASIA2 (P>0.05). For measurements with Pentacam and CASIA2, the COR of ACD, CCT, SCT, NCT, ICT and TCT was 0.294 mm, 13.10, 51.57, 48.06, 56.21 and 47.69 µm respectively. No significant differences were found between the values measured by CAISA2 and Pentacam for CT and ACD (P>0.05). The Bland-Altman analysis also suggested high consistency between measurements obtained by Pentacam and CASIA2. Conclusions Our results suggest that Pentacam and CASIA2 have good agreement in CT and ACD measurements. The two devices can be considered interchangeable for these parameters' measurements in healthy subjects when monitoring corneal conditions or planning ocular surgery. However, subtle differences between CASIA2 and Pentacam should also be kept in mind for certain specific clinical or research purposes.
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Affiliation(s)
- Xuepei Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Yijing Zhou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Charlotte Aimee Young
- Department of Ophthalmology, Third Affiliated Hospital, Nanchang University, Nanchang, China
| | - Aiming Chen
- The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China
| | - Guangming Jin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Danying Zheng
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
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Taşlı NG, Akbaş EM. Ocular Findings Associated with Hypoparathyroidism. Ocul Immunol Inflamm 2020; 29:1287-1291. [PMID: 32267183 DOI: 10.1080/09273948.2020.1735451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Purpose: To determine the corneal and retinal changes associated with serum calcium, phosphorus and parathyroid hormone (PTH) levels in patients with hypoparathyroidism.Methods: Patients who were under follow-up for hypoparathyroidism in the endocrinology department were included in the study. All participants underwent a complete ophthalmological examination. Moreover, central corneal thickness (CCT), anterior chamber depth (ACD), retinal nerve fiber layer (RNFL) thickness, ganglion cell layer (GCL) thickness were recorded. Serum biochemical parameters were recorded.Results: In a total of 75 patients (35 in the hypoparathyroidism group and 40 in the healthy control group) were included in this study. Central corneal thickness (519.95 ± 33.21 vs. 539.10 ± 32.96, p: 0.001) and RNFL (105.10 ± 11.89 vs. 113.56 ± 9.54, p: 0.005) were significantly thinner and ACD was significantly deeper in the hypoparathyroidism group.Conclusion: We determined thinner CCT and RNFL values in patients with hypoparathyroidism related to serum calcium levels together with a significant deepness in ACD.
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Affiliation(s)
- Nurdan Gamze Taşlı
- Department of Ophthalmology, College of Medicine, Erzincan Binali Yıldırım University Hospital, Erzincan, Turkey
| | - Emin Murat Akbaş
- Department of Internal Medicine, Division of Endocrinology, College of Medicine, Erzincan Binali Yıldırım University Hospital, Erzincan, Turkey
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Jung SH, Kim S, Chung SH. Anterior Chamber and Lens Position before and after Phacoemulsification According to Axial Length. JOURNAL OF THE KOREAN OPHTHALMOLOGICAL SOCIETY 2020. [DOI: 10.3341/jkos.2020.61.1.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Suk Hoon Jung
- Department of Ophthalmology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Seonjoo Kim
- Department of Ophthalmology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - So Hyang Chung
- Department of Ophthalmology, Seoul St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Einan-Lifshitz A, Rozenberg A, Wang L, Koch DD, Shoshany N, Zadok D, Avni I, Abulafia A. Accuracy and feasibility of axial length measurements by a new optical low-coherence reflectometry-based device in eyes with posterior subcapsular cataract. J Cataract Refract Surg 2019; 43:898-901. [PMID: 28823435 DOI: 10.1016/j.jcrs.2017.04.035] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2017] [Revised: 04/06/2017] [Accepted: 04/11/2017] [Indexed: 10/19/2022]
Abstract
PURPOSE To evaluate the feasibility and accuracy of measuring axial length (AL) by a new optical low-coherence reflectometry (OLCR)-based device in eyes with central posterior subcapsular cataract (PSC). SETTING Department of Ophthalmology, Assaf-Harofeh Medical Center, Zerifin, Israel. DESIGN Retrospective case series. METHODS Consecutive cases of patients who had uneventful cataract surgery and whose preoperative AL measurements were not feasible with the partial coherence interferometry (PCI) device because of a central PSC were assessed. Preoperative AL was measured by the OLCR device and immersion ultrasound (US). Preoperative results were compared with the postoperative AL measurements obtained by the PCI. RESULTS Twenty-seven patients (27 eyes) were enrolled in the study. The median difference between the OLCR and the PCI AL measurements (0.07 mm) was lower than the median difference between the US and the PCI AL measurements (0.13 mm) (P = .016). The ranges of the limits of agreement were 0.15 mm between OLCR and PCI, and 0.88 mm between US and PCI. The proportion of eyes with an AL difference of less than 0.1 mm was significantly higher between the OLCR and the PCI devices (24 eyes [88.9%]) than between the US and the PCI devices (9 eyes [33.3%]) (P = .001). CONCLUSIONS The OLCR-based device successfully measured the preoperative AL in all eyes with central PSC for which preoperative PCI scans were not feasible. These measurements had a high level of agreement with the postoperative AL measurements obtained by the PCI device.
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Affiliation(s)
- Adi Einan-Lifshitz
- From the Assaf Harofeh Medical Center (Einan-Lifshitz, Rozenberg, Shoshany, Zerifin, Avni), the Sackler School of Medicine (Einan-Lifshitz, Rozenberg, Shoshany, Avni), Tel Aviv University, Tel Aviv, and the Shaare Zedek Medical Centre (Zadok, Abulafia) and the Hebrew University of Jerusalem (Zadok, Abulafia), Jerusalem, Israel; the Cullen Eye Institute (Wang, Koch), Baylor College of Medicine, Houston, Texas, USA.
| | - Assaf Rozenberg
- From the Assaf Harofeh Medical Center (Einan-Lifshitz, Rozenberg, Shoshany, Zerifin, Avni), the Sackler School of Medicine (Einan-Lifshitz, Rozenberg, Shoshany, Avni), Tel Aviv University, Tel Aviv, and the Shaare Zedek Medical Centre (Zadok, Abulafia) and the Hebrew University of Jerusalem (Zadok, Abulafia), Jerusalem, Israel; the Cullen Eye Institute (Wang, Koch), Baylor College of Medicine, Houston, Texas, USA
| | - Li Wang
- From the Assaf Harofeh Medical Center (Einan-Lifshitz, Rozenberg, Shoshany, Zerifin, Avni), the Sackler School of Medicine (Einan-Lifshitz, Rozenberg, Shoshany, Avni), Tel Aviv University, Tel Aviv, and the Shaare Zedek Medical Centre (Zadok, Abulafia) and the Hebrew University of Jerusalem (Zadok, Abulafia), Jerusalem, Israel; the Cullen Eye Institute (Wang, Koch), Baylor College of Medicine, Houston, Texas, USA
| | - Douglas D Koch
- From the Assaf Harofeh Medical Center (Einan-Lifshitz, Rozenberg, Shoshany, Zerifin, Avni), the Sackler School of Medicine (Einan-Lifshitz, Rozenberg, Shoshany, Avni), Tel Aviv University, Tel Aviv, and the Shaare Zedek Medical Centre (Zadok, Abulafia) and the Hebrew University of Jerusalem (Zadok, Abulafia), Jerusalem, Israel; the Cullen Eye Institute (Wang, Koch), Baylor College of Medicine, Houston, Texas, USA
| | - Nadav Shoshany
- From the Assaf Harofeh Medical Center (Einan-Lifshitz, Rozenberg, Shoshany, Zerifin, Avni), the Sackler School of Medicine (Einan-Lifshitz, Rozenberg, Shoshany, Avni), Tel Aviv University, Tel Aviv, and the Shaare Zedek Medical Centre (Zadok, Abulafia) and the Hebrew University of Jerusalem (Zadok, Abulafia), Jerusalem, Israel; the Cullen Eye Institute (Wang, Koch), Baylor College of Medicine, Houston, Texas, USA
| | - David Zadok
- From the Assaf Harofeh Medical Center (Einan-Lifshitz, Rozenberg, Shoshany, Zerifin, Avni), the Sackler School of Medicine (Einan-Lifshitz, Rozenberg, Shoshany, Avni), Tel Aviv University, Tel Aviv, and the Shaare Zedek Medical Centre (Zadok, Abulafia) and the Hebrew University of Jerusalem (Zadok, Abulafia), Jerusalem, Israel; the Cullen Eye Institute (Wang, Koch), Baylor College of Medicine, Houston, Texas, USA
| | - Isaac Avni
- From the Assaf Harofeh Medical Center (Einan-Lifshitz, Rozenberg, Shoshany, Zerifin, Avni), the Sackler School of Medicine (Einan-Lifshitz, Rozenberg, Shoshany, Avni), Tel Aviv University, Tel Aviv, and the Shaare Zedek Medical Centre (Zadok, Abulafia) and the Hebrew University of Jerusalem (Zadok, Abulafia), Jerusalem, Israel; the Cullen Eye Institute (Wang, Koch), Baylor College of Medicine, Houston, Texas, USA
| | - Adi Abulafia
- From the Assaf Harofeh Medical Center (Einan-Lifshitz, Rozenberg, Shoshany, Zerifin, Avni), the Sackler School of Medicine (Einan-Lifshitz, Rozenberg, Shoshany, Avni), Tel Aviv University, Tel Aviv, and the Shaare Zedek Medical Centre (Zadok, Abulafia) and the Hebrew University of Jerusalem (Zadok, Abulafia), Jerusalem, Israel; the Cullen Eye Institute (Wang, Koch), Baylor College of Medicine, Houston, Texas, USA
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Guo XX, You R, Li SS, Yang XF, Zhao L, Zhang F, Wang YL, Chen X. Comparison of ocular parameters of two biometric measurement devices in highly myopic eyes. Int J Ophthalmol 2019; 12:1548-1554. [PMID: 31637189 DOI: 10.18240/ijo.2019.10.05] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Accepted: 07/11/2019] [Indexed: 11/23/2022] Open
Abstract
AIM To compare the differences and agreement of ocular biometric parameters in highly myopic eyes obtained by optical biometric measurement instruments, the OA-2000 and IOLMaster 500. METHODS Totally, 90 patients (90 eyes) were included. They were divided into high myopia group and control group. Ocular parameters, including axial length (AL), mean keratometry (Km), anterior chamber depth (ACD), and white to white (WTW), were obtained from the OA-2000 and IOLMaster 500. RESULTS For the control group, we applied Bland-Altman graphs to assess the 95% limits of agreement (LoA) for most parameters including AL, ACD, Km, and WTW (-0.24 to 0.29 mm, -0.22 to 0.45 mm, -0.39 to 0.31 D, and -0.90 to 0.86 mm, respectively). In high myopia patients, AL, ACD, Km values had wider 95% LoA (-0.34 to 0.32 mm, -0.36 to 0.34 mm, -0.57 to 0.47 D, respectively), except WTW (-0.80 to 0.68 mm). Differences were not statistically significant between these two instruments (P>0.05). CONCLUSION Most parameters obtained by the OA-2000 and IOLMaster 500 are comparable, including the AL, ACD, and K values. Among them, the agreement of the high myopia patients is poor compared to the patients without high myopia.
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Affiliation(s)
- Xiao-Xiao Guo
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Ran You
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Shan-Shan Li
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Xiu-Fen Yang
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Lu Zhao
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Fan Zhang
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Yan-Ling Wang
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Xi Chen
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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Shrivastava AK, Behera P, Kacher R, Kumar B. Effect of anterior chamber depth on predictive accuracy of seven intraocular lens formulas in eyes with axial length less than 22 mm. Clin Ophthalmol 2019; 13:1579-1586. [PMID: 31692493 PMCID: PMC6708392 DOI: 10.2147/opth.s217932] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Accepted: 07/16/2019] [Indexed: 12/14/2022] Open
Abstract
Purpose This study aimed to evaluate whether different anterior chamber depth (ACD) affects the predictive accuracy of intraocular lens formulas in eyes with axial length (AL) less than 22 mm. Methods Eighty-five eyes of 85 patients with AL less than 22 mm were included in this retrospective study, which were divided into three groups: Group 1, ACD less than 2.4 mm; Group 2, ACD between 2.4 and 2.9 mm; and Group 3, ACD greater than 2.9 mm. Optical biometry with partial coherence interferometry was performed in all cases. The median absolute error (MedAE) was compared by Friedman’s test, using the optimized lens constant, among seven formulas (Barrett Universal II, Haigis, Hill-RBF, Hoffer Q, Holladay 1, Holladay 2, and SRK/T) in each group. Results Friedman’s test showed no significant difference in MedAE among all formulas in Groups 1 and 3. However, as the Haigis formula had the highest MedAE and lowest percentage of eyes within ±0.25 Diopter, it is least preferred in Group 1. On the contrary, in Group 3 it fared the best, having the least MedAE and highest percentage of eyes within ±0.25 Diopter. In Group 2, Friedman’s test gave significant difference, and post-hoc analysis showed statistical superiority of Haigis over the Holladay 1 (p=0.02), Holladay 2 (p=0.01), Hill-RBF (p=0.04), and SRK/T (p=0.02) formulas. However, there was no statistical difference between the Barrett Universal II, Haigis, and Hoffer Q formulas. Conclusion Considering the ACD in eyes with AL less than 22 mm, Haigis is the preferred formula while SRK/T proved to be the worst formula in Groups 2 and 3.
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Affiliation(s)
- Ankur K Shrivastava
- Department of Ophthalmology, All India Institute of Medical Sciences, Raipur, India
| | - Pranayee Behera
- Department of Ophthalmology, All India Institute of Medical Sciences, Raipur, India
| | - Rajaram Kacher
- Department of Ophthalmology, All India Institute of Medical Sciences, Raipur, India
| | - Binod Kumar
- Department of Ophthalmology, All India Institute of Medical Sciences, Raipur, India
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Intraobserver Repeatability of Corneal and Anterior Segment Parameters Obtained Using a Scheimpflug Camera-Placido Corneal Topography System. BEYOGLU EYE JOURNAL 2019; 4:82-85. [PMID: 35187438 PMCID: PMC8842055 DOI: 10.14744/bej.2019.74946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/02/2019] [Accepted: 04/05/2019] [Indexed: 12/03/2022]
Abstract
Objectives: The aim of this study was to assess the intraobserver repeatability of central corneal thickness, peripheral corneal thickness (PCT), keratometry values (steep K, flat K), white-to-white diameter, and anterior chamber depth using the Sirius topography device (Costruzione Strumenti Oftalmici, Florence, Italy) in healthy eyes. Methods: A Sirius device was used by a single examiner to assess 100 eyes in 50 healthy patients. Two consecutive scans were acquired for each eye. Repeatability was assessed using test–retest variability, the coefficient of variation (COV), and the intraclass correlation coefficient (ICC). Results: Fifty patients (100 eyes) met the inclusion criteria. There were 18 women (36%) and 32 men (64%), with an age range of 23 to 56 years. The mean age was 30.38±8.03 years. A COV of 0.4% or less and an ICC of more than 0.99 (showing excellent repeatability) were achieved for most parameters, with the exception of PCT (at 2.5-mm temporal, superior, inferior, and nasal thickness). Conclusion: The anterior segment parameters obtained using the Sirius Scheimpflug camera- Placido corneal topography system were highly repeatable.
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Meyer JJ, Vellara HR, Bhikoo R, Sefo LAC, Lolokabaira S, Murray NL, McGhee CN. Improved Refractive Outcomes of Small-Incision Extracapsular Cataract Surgery after Implementation of a Biometry Training Course. Middle East Afr J Ophthalmol 2019; 26:17-22. [PMID: 31114119 PMCID: PMC6507380 DOI: 10.4103/meajo.meajo_3_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
PURPOSE: To determine whether a biometry training course could improve refractive outcomes of patients undergoing manual small-incision extracapsular cataract surgery (SICS). MATERIALS AND METHODS: This was a prospective, interventional, cohort study at the Pacific Eye Institute, Fiji. SICS refractive outcomes were evaluated before and after a structured biometry teaching course. Eyes that underwent evaluation and subsequent SICS with placement of a posterior chamber intraocular lens (IOL) were included. Axial length measurements were obtained using A-scan applanation ultrasound and keratometry with a handheld keratometer. Main outcome measures included mean absolute prediction error of IOL calculations, percentage of eyes within ±0.5 D and ±1.0 D of intended spherical equivalent, and proportion of eyes with ≥6/18 uncorrected visual acuity. RESULTS: A total of 240 eyes were analyzed: 120 eyes before and 120 eyes after the structured biometry training. The mean absolute prediction error was 50% lower following the training (1.13 ± 0.84 D pre vs. 0.56 ± 0.44 D post; P < 0.001). A higher percentage of the eyes had a postoperative spherical equivalent within ±0.5 D (26.7% pre vs. 52.5% post; P < 0.001) and ±1.0 D (55.0% pre vs. 90.0% post; P < 0.001) of the intended target. A higher proportion of the eyes achieved ≥6/18 uncorrected visual acuity (77.5% pre vs. 91.7% post, P = 0.004), while the proportion with ≥6/18 corrected visual acuity was similar (94.4% pre vs. 98.3% post; P = 0.28). CONCLUSIONS: A structured biometry training course may improve the accuracy of preoperative IOL calculations to achieve the postoperative refractive target. Ophthalmology training programs should include structured biometry teaching in their curricula.
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Affiliation(s)
- Jay J Meyer
- Fred Hollows Foundation New Zealand, Auckland.,Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, New Zealand
| | - Hans R Vellara
- Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, New Zealand
| | - Riyaz Bhikoo
- Fred Hollows Foundation New Zealand, Auckland.,Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, New Zealand
| | | | | | | | - Charles Nj McGhee
- Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, New Zealand
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McNabb RP, Polans J, Keller B, Jackson-Atogi M, James CL, Vann RR, Izatt JA, Kuo AN. Wide-field whole eye OCT system with demonstration of quantitative retinal curvature estimation. BIOMEDICAL OPTICS EXPRESS 2019; 10:338-355. [PMID: 30775104 PMCID: PMC6363197 DOI: 10.1364/boe.10.000338] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 12/07/2018] [Accepted: 12/08/2018] [Indexed: 05/06/2023]
Abstract
Current conventional clinical OCT systems image either only the anterior or the posterior eye during a single acquisition. This localized imaging limits conventional OCT's use for characterizing global ocular morphometry and biometry, which requires knowledge of spatial relationships across the entire eye. We developed a "whole eye" optical coherence tomography system that simultaneously acquires volumes with a wide field-of-view for both the anterior chamber (14 x 14 mm) and retina (55°) using a single source and detector. This system was used to measure retinal curvature in a pilot population and compared against curvature of the same eyes measured with magnetic resonance imaging.
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Affiliation(s)
- Ryan P. McNabb
- Department of Ophthalmology, Duke University Medical Center, 2351 Erwin Road, Durham, NC 27710, USA
| | - James Polans
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham, NC, 27708, USA
| | - Brenton Keller
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham, NC, 27708, USA
| | - Moseph Jackson-Atogi
- Department of Ophthalmology, Duke University Medical Center, 2351 Erwin Road, Durham, NC 27710, USA
| | - Charlene L. James
- Department of Ophthalmology, Duke University Medical Center, 2351 Erwin Road, Durham, NC 27710, USA
| | - Robin R. Vann
- Department of Ophthalmology, Duke University Medical Center, 2351 Erwin Road, Durham, NC 27710, USA
| | - Joseph A. Izatt
- Department of Ophthalmology, Duke University Medical Center, 2351 Erwin Road, Durham, NC 27710, USA
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham, NC, 27708, USA
| | - Anthony N. Kuo
- Department of Ophthalmology, Duke University Medical Center, 2351 Erwin Road, Durham, NC 27710, USA
- Department of Biomedical Engineering, Duke University, 101 Science Drive, Durham, NC, 27708, USA
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Martínez-Albert N, Esteve-Taboada JJ, Montés-Micó R, Fernández-Vega-Cueto L, Ferrer-Blasco T. Repeatability assessment of biometric measurements with different refractive states and age using a swept-source biometer. Expert Rev Med Devices 2018; 16:63-69. [DOI: 10.1080/17434440.2019.1557517] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Noelia Martínez-Albert
- Department of Optics and Optometry and Vision Sciences, University of Valencia, Burjassot, Spain
| | - Jose J. Esteve-Taboada
- Department of Optics and Optometry and Vision Sciences, University of Valencia, Burjassot, Spain
| | - Robert Montés-Micó
- Department of Optics and Optometry and Vision Sciences, University of Valencia, Burjassot, Spain
| | | | - Teresa Ferrer-Blasco
- Department of Optics and Optometry and Vision Sciences, University of Valencia, Burjassot, Spain
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Shrivastava AK, Behera P, Kumar B, Nanda S. Precision of intraocular lens power prediction in eyes shorter than 22 mm: An analysis of 6 formulas. J Cataract Refract Surg 2018; 44:1317-1320. [DOI: 10.1016/j.jcrs.2018.07.023] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 06/23/2018] [Accepted: 07/04/2018] [Indexed: 12/12/2022]
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