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Marino AV, La Marca A, De Luca M, Gioia M. Choroidal involvement in mediterranean fever. Photodiagnosis Photodyn Ther 2023; 42:103579. [PMID: 37084930 DOI: 10.1016/j.pdpdt.2023.103579] [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: 03/25/2023] [Accepted: 04/18/2023] [Indexed: 04/23/2023]
Abstract
Standardized measurements are needed to obtain reliable data, therefore the aim of this letter is to clarify some points.
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Affiliation(s)
- Andrea Valerio Marino
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Aniello La Marca
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, SA, Italy.
| | - Martina De Luca
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
| | - Marco Gioia
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Baronissi, SA, Italy
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Capasso L, De Bernardo M, Borrelli M. Editorial: Corneal disease: an update. Front Med (Lausanne) 2023; 10:1181810. [PMID: 37138760 PMCID: PMC10150379 DOI: 10.3389/fmed.2023.1181810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 03/28/2023] [Indexed: 05/05/2023] Open
Affiliation(s)
- Luigi Capasso
- Banca degli Occhi della Regione Campania, PO dei Pellegrini, ASL Napoli 1 Centro, Naples, Italy
- UOC Oculistica, Ospedale del Mare, ASL Napoli 1 Centro, Naples, Italy
| | - Maddalena De Bernardo
- Eye Unit, Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana”, University of Salerno, Salerno, Italy
- *Correspondence: Maddalena De Bernardo
| | - Maria Borrelli
- Department of Ophthalmology, University of Düsseldorf, Düsseldorf, Germany
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De Bernardo M, Pagliarulo S, Rosa N. Unexpected ocular morphological changes after corneal refractive surgery: A review. Front Med (Lausanne) 2022; 9:1014277. [PMID: 36523778 PMCID: PMC9745030 DOI: 10.3389/fmed.2022.1014277] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/24/2022] [Indexed: 08/15/2023] Open
Abstract
Corneal refractive surgery (CRS) currently is widely used to correct refractive errors because of its efficacy and reliability. Several studies dealt with the corneal modification induced by this type of surgery, but it is still debated if CRS can induce unexpected changes namely anterior chamber depth (ACD) and axial length (AL). A literature review was performed, including all articles regarding CRS and eye-variations from 1999 to December 2021. Excluding articles about specific systemic conditions (e.g., pregnancy), pathological conditions, post-surgical complications or about only corneal flattening and thinning post CRS, we found nine studies that met the search criteria. We divided the found articles according to the type of surgery performed (radial keratotomy, PRK/LASEK, lasik) and analyzed the results about ACD and AL. Finally, according to the literature, we can conclude that CRS not only gives a corneal flattening, thinning and biomechanical changes, but also induces AL and ACD decrease. This makes the AL and ACD measurements obtained before CRS uselessness in case of IOL power calculation.
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Comparison between dynamic contour tonometry and Goldmann applanation tonometry correcting equations. Sci Rep 2022; 12:20190. [PMID: 36418360 PMCID: PMC9684577 DOI: 10.1038/s41598-022-24318-y] [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: 04/28/2021] [Accepted: 11/14/2022] [Indexed: 11/26/2022] Open
Abstract
In order to investigate the reliability of correcting GAT formulas in comparison with dynamic contour tonometry (DCT), this study included 112 right eyes of 112 healthy subjects aged from 21 to 77 years, whose eyes underwent to a full ophthalmologic exam. IOP was measured in each eye with DCT and then with GAT. IOP values obtained with GAT were corrected with 10 equations and then compared with those provided by DCT. Participants mean age was 42.24 ± 14.08 years; mean IOP measured with DCT was 17.61 ± 2.87 and 15.50 ± 2.47 mmHg, measured with GAT. The mean discordance between DCT and GAT measurements was 2.11 ± 2.24 mmHg. All the correcting formulas, but Srodka one (p ˂ 0.001), tend to increase the difference between GAT and DCT. According to these results Śródka equation provides the best correction, reducing the difference between the two IOP measurement methods of - 0.03 ± 0.85 mmHg. Other equations do not provide a valid improvement of the agreement between the two methods or they provide a worsening of the agreement.
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De Bernardo M, Cione F, Capasso L, Coppola A, Rosa N. A formula to improve the reliability of optical axial length measurement in IOL power calculation. Sci Rep 2022; 12:18845. [PMID: 36344612 PMCID: PMC9640640 DOI: 10.1038/s41598-022-23665-0] [Citation(s) in RCA: 28] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 11/03/2022] [Indexed: 11/09/2022] Open
Abstract
To verify the influence of axial length (AL) variations after cataract surgery in IOL power calculation. Patients underwent ophthalmic evaluation before surgery, including optical biometry with IOLMaster 500. Same exams were repeated 2 months after surgery: AL of operated eye was evaluated using two modes (pseudophakic/aphakic options). Mean Keratometry and AL changes were analyzed. Furthermore, refractive prediction error (PE) was back-calculated with Barrett Universal-II, Hoffer-Q, Holladay-1 and SRK/T formulas. To eliminate any systematic error, the mean error (ME) was zeroed-out for each formula. MEs and median absolute errors (MedAEs) of PEs were analyzed. Two-hundred-one operated eyes of 201 patients and 201 opposite eyes were evaluated. In operated eyes, mean AL difference was - 0.11 ± 0.07 mm (p < 0.001) with pseudophakic option and 0.00 ± 0.07 mm (p = 0.922) with aphakic option. There were not-statistically significant differences between MedAE of PEs calculated after zeroing-out the ME with different ALs (p > 0.05). Instead, only MEs of PEs obtained with postoperative ALs-pseudophakic option were not-statistically different from zero (p > 0.05). AL measurement change after cataract surgery is probably due to a systematic error in optical biometer in case of phakic eyes. A correction factor applied to preoperative AL could eliminate any systematic error in IOL power calculation without modifying the lens constant.
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Affiliation(s)
- Maddalena De Bernardo
- grid.11780.3f0000 0004 1937 0335Eye Unit, Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Via Salvador Allende 1, Baronissi, Salerno, Italy
| | - Ferdinando Cione
- grid.11780.3f0000 0004 1937 0335Eye Unit, Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Via Salvador Allende 1, Baronissi, Salerno, Italy
| | - Luigi Capasso
- Corneal Transplant Unit, ASL Napoli 1, Naples, Italy
| | - Alessia Coppola
- grid.11780.3f0000 0004 1937 0335Eye Unit, Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Via Salvador Allende 1, Baronissi, Salerno, Italy
| | - Nicola Rosa
- grid.11780.3f0000 0004 1937 0335Eye Unit, Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Via Salvador Allende 1, Baronissi, Salerno, Italy
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Optical Coherence Tomography Analysis of Retinal Layers in Celiac Disease. J Clin Med 2022; 11:jcm11164727. [PMID: 36012966 PMCID: PMC9409633 DOI: 10.3390/jcm11164727] [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: 07/18/2022] [Revised: 08/03/2022] [Accepted: 08/11/2022] [Indexed: 02/07/2023] Open
Abstract
Celiac disease is an immune-mediated, chronic, inflammatory, and systemic illness which could affect the eye. The aim of this study is to look for possible signs of retinal involvement in celiac disease that could be utilized as biomarkers for this disease. Sixty-six patients with celiac disease and sixty-six sex-matched healthy subjects were enrolled in this observational case–control study. A comprehensive ophthalmological evaluation, axial length measurements, and SD-OCT evaluation were performed. The thickness of the retinal layers at the circle centered on the fovea (1 mm in diameter) and the average of the foveal and parafoveal zones at 2 and 3 mm in diameter were evaluated, together with retinal volume and the peripapillary retinal nerve fiber layer (RNFL). Concerning the thicknesses of the retinal layers in each analyzed region, no statistically significant differences were found. The same results were obtained for the total volume. Regarding peripapillary RNFL, the celiac patients showed slightly thicker values than the healthy controls, except for temporal and nasal-inferior quadrants, with no statistically significant differences. All the analyzed parameters were similar for the celiac patients and the healthy individuals. This could be related either to the non-involvement of the retinal layers in celiac disease pathophysiology or to the gluten-free diet effect.
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Recent Evidence of Tea Tree Oil Effectiveness in Blepharitis Treatment. BIOMED RESEARCH INTERNATIONAL 2022; 2022:9204251. [PMID: 35941981 PMCID: PMC9356889 DOI: 10.1155/2022/9204251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 03/21/2022] [Accepted: 06/30/2022] [Indexed: 11/23/2022]
Abstract
The purpose of our study is to see how beneficial is tea tree oil (TTO) for treating chronic blepharitis topically, with a focus on the Demodex mite. To discover all possibly relevant published papers, an accurate Pubmed database search analysis of the current literature was undertaken from 2012 to December 2021. Fourteen papers dealing with the use of TTO to treat chronic blepharitis have been found. The effectiveness of TTO treatment was tested in vitro by 4 authors and in vivo by 10 authors. All studied confirmed efficacy of TTO treatment, even cyclic, on Demodex mite blepharitis. TTO can be used for lid scrubs, facial cleanser, eyelid patch, eyelid gel, eyelash shampoo or, more commonly, as TTO impregnated eyelid wipes. The scientific evidence of TTO for chronic blepharitis treatment gives a lot of confidence for the progress that this treatment may have in the future clinical practice.
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Cione F, De Bernardo M, Rosa N. Comment on Iida et al. Development of a New Method for Calculating Intraocular Lens Power after Myopic Laser In Situ Keratomileusis by Combining the Anterior–Posterior Ratio of the Corneal Radius of the Curvature with the Double-K Method. J. Clin. Med. 2022, 11, 522. J Clin Med 2022; 11:jcm11071996. [PMID: 35407603 PMCID: PMC9000176 DOI: 10.3390/jcm11071996] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/11/2022] [Accepted: 03/31/2022] [Indexed: 02/04/2023] Open
Affiliation(s)
- Ferdinando Cione
- Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, 84122 Salerno, Italy
| | - Maddalena De Bernardo
- Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, 84122 Salerno, Italy
| | - Nicola Rosa
- Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, 84122 Salerno, Italy
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D'Aniello E, Stasi MD, Reda L. Letter: Evaluation of peripapillary - macular microvascularity and choroidal vascularity index after refractive surgery. Photodiagnosis Photodyn Ther 2022; 38:102833. [PMID: 35341981 DOI: 10.1016/j.pdpdt.2022.102833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Eleonora D'Aniello
- Eye Unit, Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy.
| | - Margherita Di Stasi
- Eye Unit, Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy
| | - Ludovica Reda
- Eye Unit, Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Italy
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De Bernardo M, Vitiello L, Gagliardi M, Capasso L, Rosa N, Ciacci C. Ocular anterior segment and corneal parameters evaluation in celiac disease. Sci Rep 2022; 12:2203. [PMID: 35140276 PMCID: PMC8828852 DOI: 10.1038/s41598-022-06058-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 01/21/2022] [Indexed: 12/11/2022] Open
Abstract
This observational case-control study evaluated the anterior ocular segment parameters of patients with celiac disease with a Scheimpflug imaging system and compared them with those of a healthy controls group, highlighting potential differences related to the underlying pathogenetic mechanisms of the disease. Seventy celiac patients and 70 healthy subjects were assessed with a comprehensive ophthalmological evaluation, including clinical history, Snellen best-corrected visual acuity, axial length (AL) measurements with IOLMaster, and anterior segment tomographic evaluation with Pentacam HR. The measurements of all keratometry values, astigmatism, steep axis, anterior and posterior Q value (asphericity), pupil diameter, pupil center, corneal apex, the thinnest point, corneal volume, anterior chamber depth from the epithelium, anterior chamber depth from endothelium, anterior chamber volume, and iridocorneal angle were also appraised. The two study groups were comparable and similar for gender, age, and AL, with no statistically significant differences regarding all analyzed tomographic parameters. Thus, ocular anterior segment parameters of celiac patients are not significantly different from those of healthy subjects, suggesting no underlying pathogenetic implications of celiac disease affecting the assessed structures. Nevertheless, a routine ophthalmological examination for all celiac patients should be recommended throughout their lifetimes due to the potential ocular manifestations of the disease.
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Affiliation(s)
- Maddalena De Bernardo
- Eye Unit, Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Salerno, Italy
| | - Livio Vitiello
- Eye Unit, Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Salerno, Italy.
| | - Mario Gagliardi
- Celiac Centre At University Hospital San Giovanni Di Dio E Ruggi d'Aragona, University of Salerno, Salerno, Italy
| | - Luigi Capasso
- Corneal Transplant Unit, ASL Napoli 1, Naples, Italy
| | - Nicola Rosa
- Eye Unit, Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Salerno, Italy
| | - Carolina Ciacci
- Celiac Centre At University Hospital San Giovanni Di Dio E Ruggi d'Aragona, University of Salerno, Salerno, Italy
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Tognetto D, Giglio R, Vinciguerra AL, Milan S, Rejdak R, Rejdak M, Zaluska-Ogryzek K, Zweifel S, Toro MD. Artificial intelligence applications and cataract management: A systematic review. Surv Ophthalmol 2021; 67:817-829. [PMID: 34606818 DOI: 10.1016/j.survophthal.2021.09.004] [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: 05/09/2021] [Revised: 09/27/2021] [Accepted: 09/27/2021] [Indexed: 11/26/2022]
Abstract
Artificial intelligence (AI)-based applications exhibit the potential to improve the quality and efficiency of patient care in different fields, including cataract management. A systematic review of the different applications of AI-based software on all aspects of a cataract patient's management, from diagnosis to follow-up, was carried out in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. All selected articles were analyzed to assess the level of evidence according to the Oxford Centre for Evidence-Based Medicine 2011 guidelines, and the quality of evidence according to the Grading of Recommendations Assessment, Development and Evaluation system. Of the articles analyzed, 49 met the inclusion criteria. No data synthesis was possible for the heterogeneity of available data and the design of the available studies. The AI-driven diagnosis seemed to be comparable and, in selected cases, to even exceed the accuracy of experienced clinicians in classifying disease, supporting the operating room scheduling, and intraoperative and postoperative management of complications. Considering the heterogeneity of data analyzed, however, further randomized controlled trials to assess the efficacy and safety of AI application in the management of cataract should be highly warranted.
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Affiliation(s)
- Daniele Tognetto
- Eye Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Rosa Giglio
- Eye Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy.
| | - Alex Lucia Vinciguerra
- Eye Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Serena Milan
- Eye Clinic, Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Robert Rejdak
- Chair and Department of General and Pediatric Ophthalmology, Medical University of Lublin, Lublin, Poland
| | | | | | | | - Mario Damiano Toro
- Department of Ophthalmology, University of Zurich, Zurich; Department of Medical Sciences, Collegium Medicum, Cardinal Stefan Wyszyński University, Warsaw, Poland
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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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Comparison between two devices in the detection of corneal thickness changes after cataract surgery. Sci Rep 2021; 11:6709. [PMID: 33758298 PMCID: PMC7988103 DOI: 10.1038/s41598-021-86158-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 03/10/2021] [Indexed: 12/14/2022] Open
Abstract
This study compared corneal thickness (CT) changes obtained with specular microscopy (SM) and a rotating Scheimpflug camera (RSC) after conventional phacoemulsification surgery (PS). One hundred sixty six eyes of 83 patients were analyzed before and one month after PS. One eye underwent PS, while the fellow phakic one was used as control. CT was measured with SM at the center of the cornea and with RSC at the pupil center, at the corneal apex and at the thinnest point. In the operated eye, SM showed a larger CT mean increase than those one detected at the three different measurements’ points evaluated by RSC. Inversely, in the fellow phakic eye, SM showed a greater CT mean decrease than those one registered by RSC at its three measurement’s points. Thus, one month after surgery, even if cornea appears clear at the slit-lamp, a significant thickness increase is still present. This is even more evident if the slight decrease of the fellow phakic eye is considered. The differences between the two devices are probably related to the different measured areas.
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Rosa N, De Bernardo M, Pepe A, Vitiello L, Marotta G, Imparato R, Capasso L. Corneal thickness evaluation in healthy eyes: Comparison between two different Scheimpflug devices. PLoS One 2020; 15:e0243370. [PMID: 33270786 PMCID: PMC7714349 DOI: 10.1371/journal.pone.0243370] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/19/2020] [Indexed: 11/30/2022] Open
Abstract
Purpose To evaluate the correlation between corneal thickness (CT) measurements obtained with two Scheimpflug devices, Pentacam HR and Precisio, and to elaborate, if necessary, a regression formula which could make these results comparable. Design Retrospective, Comparative, Observational study. Setting Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana” University of Salerno, Italy Methods One hundred twenty four healthy eyes of 124 volunteers (65 males; range: 20–32 years; mean age of 24.8 ± 1.7) were included in this study. CT was measured using Pentacam HR and Precisio in three different points: the pupil center (PC), the corneal apex (CA) and the thinnest point (TP). Results CT obtained with both devices at the PC, at the CA and at the TP showed a good correlation (r = 0.97, r = 0.97, r = 0.97, respectively), but Pentacam HR measurements were significantly thicker than those provided by Precisio (p < 0.01). The differences between Pentacam HR and Precisio were 21.9 ± 8.8 μm at the PC, 21.9 ± 8.9 μm at the CA, 19.1 ± 9.0 μm at the TP. The calculated regression formulas were: y = 0.9558x + 2.3196 for the PC, y = 0.9519x + 4.5626 for the CA, y = 0.9364x + 15.436 for the TP, where x is the CT measured with Pentacam HR and y is the Precisio measurement. Conclusions The findings provided by this study highlight that Precisio measures thinner corneas compared to Pentacam HR. The identified regression formulas could be utilized to make interchangeable the results obtained with these two devices.
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Affiliation(s)
- Nicola Rosa
- Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana” University of Salerno, Baronissi, Salerno, Italy
| | - Maddalena De Bernardo
- Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana” University of Salerno, Baronissi, Salerno, Italy
- * E-mail:
| | - Angela Pepe
- Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana” University of Salerno, Baronissi, Salerno, Italy
| | - Livio Vitiello
- Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana” University of Salerno, Baronissi, Salerno, Italy
| | - Giuseppe Marotta
- Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana” University of Salerno, Baronissi, Salerno, Italy
| | - Roberto Imparato
- Department of Medicine, Surgery and Dentistry, “Scuola Medica Salernitana” University of Salerno, Baronissi, Salerno, Italy
| | - Luigi Capasso
- Corneal Transplant Unit, ASL Napoli 1, Naples, Italy
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Rosa N, Cione F, Pepe A, Musto S, De Bernardo M. An Advanced Lens Measurement Approach (ALMA) in post refractive surgery IOL power calculation with unknown preoperative parameters. PLoS One 2020; 15:e0237990. [PMID: 32841281 PMCID: PMC7447029 DOI: 10.1371/journal.pone.0237990] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 08/06/2020] [Indexed: 12/23/2022] Open
Abstract
PURPOSE To test a new method to calculate the Intraocular Lens (IOL) power, that combines R Factor and ALxK methods, that we called Advance Lens Measurement Approach (ALMA). DESIGN Retrospective, Comparative, Observational study. SETTING Department of Medicine and Surgery, University of Salerno, Italy. METHODS Ninety one eyes of 91 patients previously treated with Photorefractive Keratectomy (PRK) or Laser-Assisted in Situ Keratomileusis (LASIK) that underwent phacoemulsification and IOL implantation in the capsular bag were analyzed. For 68 eyes it was possible to zero out the Mean Errors (ME) for each formula and for selected IOL models, in order to eliminate the bias of the lens factor (A-Costant). Main outcome, measured in this study, was the median absolute error (MedAE) of the refraction prediction. RESULTS In the sample with ME zeroed (68 eyes) both R Factor and ALxK methods resulted in MedAE of 0.67 D. For R Factor 33 eyes (48.53%) reported a refractive error <0.5D, and 53 eyes (77.94%) reported a refractive error <1D, For ALxK method, 32 eyes (47.06%) reported a refractive error <0.5 D, and 53 eyes (77.94%) reported a refractive error <1 D. ALMA method, reported a MedAE of 0.55 D, and an higher number of patients with a refractive error <0.5 D (35 eyes, 51.47%), and with a refractive error <1 D (54 eyes, 79.41%). CONCLUSIONS Based on the results obtained from this study, ALMA method can improve R Factor and ALxK methods. This improvement is confirmed both by zeroing the mean error and without zeroing it.
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Affiliation(s)
- Nicola Rosa
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Salerno, Italy
| | - Ferdinando Cione
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Salerno, Italy
| | - Angela Pepe
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Salerno, Italy
| | - Salvatore Musto
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Salerno, Italy
| | - Maddalena De Bernardo
- Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, Salerno, Italy
- * E-mail:
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De Bernardo M, Borrelli M, Imparato R, Cione F, Rosa N. Anterior chamber depth measurement before and after photorefractive keratectomy. Comparison between IOLMaster and Pentacam. Photodiagnosis Photodyn Ther 2020; 32:101976. [PMID: 32841750 DOI: 10.1016/j.pdpdt.2020.101976] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 07/27/2020] [Accepted: 07/31/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND an accurate measurement of anterior chamber depth (ACD) both in eyes that underwent corneal refractive surgery (CRS) and in eyes that did not, can be crucial, as in case of intraocular lens (IOL) calculation in eyes that need to undergo cataract extraction, or during the evaluation of glaucomatous patients. The aim of this nonrandomized retrospective case series was to measure anterior chamber depth (ACD) before and after photorefractive keratectomy (PRK), comparing a rotating Scheimplfug camera (RSC) and a partial coherence interferometer (PCI). METHODS 125 right eyes of 125 patients were examined. ACD was measured with RSC and a PCI preoperatively and 1, 3 and 6 months postoperatively. The results were analyzed using Friedman and ANOVA test for repeated measures, Wilcoxon test, Pearson and Bland-Altmann correlation. RESULTS Both instruments showed an ACD decrease after CRS. The mean preoperative difference in ACD between the two instruments was 0.11 ± 0.11 (range: -0.07 mm to 0.73 mm) (p < 0.05) (r = 0.92). The mean difference in ACD reduction between the two instruments was: 0.08 ± 0.11 (range: -0.35 to 0.39 mm) (p < 0.05, r = 0.93) at 1 month; 0.13 ± 0.11 (range: -0.09 mm to 0.48 mm) (p < 0.05, r = 0.93) at 3 months; 0.14 ± 0.15 (range: -0.16 to 0.82 mm) (p < 0.05) (r = 0.87), at 6 months. CONCLUSIONS The ACD decrease shown with both instruments suggests the presence of anterior segment remodeling after PRK. RSC measurements were larger than PCI ones, both before and after PRK.
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Affiliation(s)
- Maddalena De Bernardo
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Salerno, Italy
| | - Maria Borrelli
- Department of Ophthalmology, Heinrich-Heine-University Düsseldorf, Germany
| | - Roberto Imparato
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Salerno, Italy
| | - Ferdinando Cione
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Salerno, Italy
| | - Nicola Rosa
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Salerno, Italy.
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De Bernardo M, Cione F, Rosa N. Re: Turnbull et al.: Methods for intraocular lens power calculation in cataract surgery after radial keratotomy (Ophthalmology. 2020;127:45-51). Ophthalmology 2020; 127:e87. [PMID: 32739185 DOI: 10.1016/j.ophtha.2020.05.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 05/06/2020] [Indexed: 10/23/2022] Open
Affiliation(s)
- Maddalena De Bernardo
- Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Salerno, Italy.
| | - Ferdinando Cione
- Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Salerno, Italy
| | - Nicola Rosa
- Department of Medicine, Surgery and Dentistry, Scuola Medica Salernitana, University of Salerno, Salerno, Italy
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Twenty-Year Follow-Up of Excimer Laser Photorefractive Keratectomy: A Retrospective Observational Study. Ophthalmol Ther 2020; 9:917-927. [PMID: 32725487 PMCID: PMC7708547 DOI: 10.1007/s40123-020-00281-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Indexed: 11/30/2022] Open
Abstract
Introduction Photorefractive keratectomy (PRK) was introduced in the late 1980s to correct myopia. The purpose of this study was to assess its long-term efficacy and safety, analyzing patients with at least 20-year follow-up. Methods This retrospective observational study was carried out on 85 eyes of 54 patients (33 females) that underwent PRK between 1991 and 1998 (mean age 32.62 ± 9.74, range 18–55 years). Both preoperatively and postoperatively, patients underwent a complete ophthalmological evaluation, including uncorrected and corrected distance visual acuity, slit-lamp, intraocular pressure, dilated fundus, and corneal topographic examinations. The outcome assessment was made by comparing the preoperative refraction, as spherical equivalent, with the postoperative ones, taking into account the planned refractive correction. Safety and efficacy indices were also calculated. All the data were evaluated with a paired t test. Results The mean attempted correction as spherical equivalent was – 5.64 ± 3.01 D (range – 1.00 to – 15.00 D), while the mean achieved correction after 20 years was – 4.30 ± 3.13 D (range – 1.88 to – 14.25 D), with a significant statistical difference (p < 0.01). The mean expected refractive outcome was – 0.27 ± 0.81 D (range – 4.00 to + 1.25 D). The mean difference between achieved and attempted treatment was 1.33 ± 1.92 D (range – 4.25 to + 6.25 D), with a significant difference (p < 0.01). The safety index was 1.00 and the efficacy index was 0.63. Conclusion The results provided by this study highlight that the procedure could be considered safe, with no long-term sight-threatening complications such as late ectasia or haze.
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Zhang Y, Chen H, Zhang Y, Yang Y. The differences of corneal astigmatism in different populations and its quantitative analysis. Afr Health Sci 2020; 20:775-778. [PMID: 33163043 PMCID: PMC7609078 DOI: 10.4314/ahs.v20i2.30] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Objective To analyze the differences of corneal astigmatism in different age groups. Methods The clinical data of the patients from the outpatient Department of Ophthalmology of the Tengzhou Central People's Hospital from April 2014 to June 2014 was screened and statistically analyzed. The corneal curvature was measured by three different instruments: Keratometer, IOL Master and Sirius corneal topography. The changes of the corneal astigmatism in different groups were evalutaed in the study. Results Corneal astigmatism of different groups showed no statistical difference and the average corneal astigmatism of 70˜79 age group were higher than younger groups. As the age grew, the with-the-rule astigmatism gradually reduced from 85.8% ( A Group) to 31.0% (F Group). The against-the-rule astigmatism increased from 6.7% ( A Group ) to 45.0% (F Group). Conclusion The proportion of the with-the-rule astigmatism gradually reduced with the growth of age. The proportion of the against-the-rule astigmatism increased significantly. The oblique astigmatism had no obvious change before the age of 40. The proportion of oblique astigmatism increased obviously at the 40˜49 group and tended to be stable. After the age of 60, the proportion of different types of astigmatism tended to be stable.
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Affiliation(s)
- Ying Zhang
- Departement of Ophthalmology, Tengzhou Central People's Hospital, Tengzhou, Shandong, 277500PR China
| | - Hongmei Chen
- Departement of Anesthesiology,TengZhou Central People's Hospital, Teng Zhou, Shandong,277500, PR China
| | - Yingchun Zhang
- Departement of Ophthalmology, Tengzhou Central People's Hospital, Tengzhou, Shandong, 277500PR China
| | - Yanzhen Yang
- Departement of Ophthalmology, Tengzhou Central People's Hospital, Tengzhou, Shandong, 277500PR China
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Calculation of the Real Corneal Refractive Power after Photorefractive Keratectomy Using Pentacam, When Only the Preoperative Refractive Error is Known. J Ophthalmol 2020; 2020:1916369. [PMID: 32318276 PMCID: PMC7152949 DOI: 10.1155/2020/1916369] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 02/10/2020] [Accepted: 02/17/2020] [Indexed: 11/17/2022] Open
Abstract
Purpose To check if a regression formula, IOLMaster-derived, to calculate the real corneal power after photorefractive keratectomy (PRK), can give reliable results utilizing the Pentacam. Methods Pre- and postoperative IOLMaster, Km, and Pentacam K readings were measured. Patients who had myopic PRK were divided into two groups: the first group (108 eyes) was utilized to check which of the preop Pentacam K readings (P-Kpre) better fitted with the preop IOLMaster measurements; in the second group (120 eyes), the real K (Kr), obtained adding the effective treatment to the P-Kpre, were compared with the K readings calculated with the IOLMaster-derived formula (Kc). Moreover, an attempt to find a different formula utilizing the P-Kpre was made. Results In group 1, the best correlation was found between IOLMaster Km and Pentacam equivalent K readings (r2 0.9519). In group 2, the comparison between Kr and Pentacam postop Km showed 69 eyes (57%) with differences >0.5 D and 38 eyes (31%) with differences >1 D, (P < 0.001). The comparison between Kr and Kc showed 55 eyes (45%) with differences >0.5 D and 22 eyes (18%) with differences >1 D, (P < 0.001). Moreover, a regression formula K = EKR - [ETcp + (0.8114 ∗ ETcp - 0.2031)] was obtained in order to calculate the K readings to be used with the Pentacam in the IOL power calculation in case the effective treatment is known. Conclusions K calculated with the new formula could be used in patients that underwent refractive corneal surgery in case a Pentacam device is used, pending further studies conducted in clinical practice to establish its accuracy and effectiveness. This study further proves that data obtained from different machines cannot be used interchangeably.
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De Bernardo M, Zeppa L, Zeppa L, Cornetta P, Vitiello L, Rosa N. Biometric Parameters and Corneal Astigmatism: Differences Between Male and Female Eyes. Clin Ophthalmol 2020; 14:571-580. [PMID: 32184545 PMCID: PMC7053823 DOI: 10.2147/opth.s219912] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Accepted: 10/15/2019] [Indexed: 11/23/2022] Open
Abstract
Purpose To evaluate the gender-related differences in demographic and ocular biometric trends in a defined population presenting for consultation within the Italian public health system and to collect data of several ocular parameters at different stages of life, highlighting the differences between females and males. Patients and Methods In this retrospective study, keratometry, corneal astigmatism, and axial eye length of 729 patients (729 eyes; mean age: 58±21 years; range: 18–96 years) were evaluated using partial coherence interferometry. Statistical evaluation was performed utilizing a paired t-test and R2 analysis. Results In females (396 eyes of 396 patients), mean keratometry ranged between 40.59–47.78 D (44.27±1.36 D), corneal astigmatism ranged between 0–3.82 D (1.13±0.74 D), and axial length ranged between 20.5–31.32 mm (24.07±1.74 mm). In males (333 eyes of 333 patients), mean keratometry ranged between 38.5–46.95 D (43.54±1.35 D; p<0.001), corneal astigmatism ranged between 0.1–3.97 D (1.15±0.79; p=0.75), and axial length ranged between 20.41–31.21 mm (24.57±1.78 mm; p<0.001). Both genders presented a shorter axial length in advanced age. Elderly males presented a higher percentage of against-the-rule astigmatism. Conclusion Females may have steeper corneas and shorter eyes. A trend toward axial length reduction with age was observed in both genders. This finding is probably due to the difference in growth between generations, as the new ones have an higher size than the old ones.
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Affiliation(s)
- Maddalena De Bernardo
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Salerno, Italy
| | - Lucio Zeppa
- San Giuseppe Moscati Hospital, Avellino, Italy
| | - Lucia Zeppa
- San Giuseppe Moscati Hospital, Avellino, Italy
| | - Palmiro Cornetta
- Presidio Ospedaliero "Maria SS Addolorata", ASL Salerno, Eboli, Salerno, Italy
| | - Livio Vitiello
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Salerno, Italy
| | - Nicola Rosa
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Salerno, Italy
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De Bernardo M, Cornetta P, Marotta G, Salerno G, De Pascale I, Rosa N. Measurement of corneal thickness using Pentacam HR versus Nidek CEM-530 specular microscopy. J Int Med Res 2019; 48:300060519892385. [PMID: 31878803 PMCID: PMC7783267 DOI: 10.1177/0300060519892385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Objective To compare corneal thickness (CT) measurements using the CEM-530 (Nidal,
Gamagori, Japan) and Pentacam HR (Oculus, Wetzlar, Germany). Methods The CT of 209 healthy subjects (209 right eyes) aged 24 to 89 years
(71.35 ± 10.72 years) was measured at the corneal apex (CA), pupil center
(PC), and thinnest point (TP) with the Pentacam HR and at the corneal center
with the CEM-530 in random order at the same time of day. Results A good correlation but statistically significant difference was found between
the CEM-530 and Pentacam HR measurements at the CA (6.10 ± 8.12 µm,
R2 = 0.8947), PC (7.46 ± 8.57 µm, R2 = 0.8826),
and TP (12.44 ± 10.04 µm, R2 = 0.8392). Comparison of the two
devices produced the following regression formulas: y = 0.8859x + 57.644 for
the CA, y = 0.8852x +56.657 for the PC, and y = 0.8557x + 68.148 for the TP,
where x is the CT obtained with the CEM-530 and y is that obtained with the
Pentacam HR. Conclusions These findings indicate that the CEM-530 produces a thicker corneal
measurement than the Pentacam HR. The herein-proposed correcting factors are
needed to reliably compare these devices.
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Affiliation(s)
- Maddalena De Bernardo
- Department of Medicine, Surgery, and Dentistry, Scuola Medica Salernitana, University of Salerno, Baronissi, Salerno, Italy
| | - Palmiro Cornetta
- Department of Medicine, Surgery, and Dentistry, Scuola Medica Salernitana, University of Salerno, Baronissi, Salerno, Italy
| | - Giuseppe Marotta
- Department of Medicine, Surgery, and Dentistry, Scuola Medica Salernitana, University of Salerno, Baronissi, Salerno, Italy
| | - Giulio Salerno
- Department of Medicine, Surgery, and Dentistry, Scuola Medica Salernitana, University of Salerno, Baronissi, Salerno, Italy
| | - Ilaria De Pascale
- Department of Medicine, Surgery, and Dentistry, Scuola Medica Salernitana, University of Salerno, Baronissi, Salerno, Italy
| | - Nicola Rosa
- Department of Medicine, Surgery, and Dentistry, Scuola Medica Salernitana, University of Salerno, Baronissi, Salerno, Italy
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Hua Y, Pan C, Wang Q. Assessment of total corneal power after myopic corneal refractive surgery in Chinese eyes. Int Ophthalmol 2019; 39:2467-2475. [PMID: 30825050 DOI: 10.1007/s10792-019-01089-6] [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: 06/08/2018] [Accepted: 02/23/2019] [Indexed: 11/30/2022]
Abstract
PURPOSE To develop a new regression formula based on the Gaussian thick lens formula and to verify the accuracy of the regression formula. METHODS In this prospective study, 207 eyes of 207 myopic subjects and 133 eyes of 67 postoperative subjects were included. For the 133 postoperative eyes, 127 eyes underwent laser-assisted in situ keratomileusis, and 6 eyes underwent photorefractive keratectomy. Subjective refraction and Pentacam HR were performed preoperatively and postoperatively, and IOLMaster was performed in the postoperative group. SimK, keratometry based on the Gaussian optic formula (KGOF), KCHM obtained using the clinical history method, and the regression formulas KRF1 and KRF2 were calculated. RESULTS (1) A statistically significant difference (t = 155.164, P = 0.000) between SimK and KGOF of 1.24 ± 0.12 D was observed, and there was a good correlation between SimK and KGOF (r = 0.996, P = 0.000). The first regression formula (KRF1 = 0.351 + 1.021 × KGOF) was obtained using linear regression. (2) Statistically significant differences (t = 19.114, - 25.184, 4.702, and all P = 0.000) between SimK and KCHM, KGOF and KCHM and KRF1 and KCHM of 0.75 ± 0.45 D, 0.96 ± 0.44 D and 0.18 ± 0.43 D, respectively, were obtained. Good correlations between SimK and KCHM, KGOF and KCHM and KRF1 and KCHM (all r ≧ 0.977, all Ps = 0.000) were also observed. The regression formula (KRF2 = - 1.204 + 1.027 × KRF1) was obtained using linear regression. (3) Six methods were used for the prediction of IOL power in the postoperative group. The highest results were obtained from the Shammas formula (without preoperative data) combining Km (obtained by IOLMaster) followed by the KCHM and KRF2 combining Haigis formula. The third was obtained from the KCHM and KRF2 combining Hoffer Q formula; and the smallest was the Km combining Haigis formula. CONCLUSION The IOL power predicted by KRF2 in eyes after myopic CRS may be accurate.
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Affiliation(s)
- Yanjun Hua
- Department of Ophthalmology, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, No. 600, Yishan Road, Xuhui District, Shanghai, 200233, China.
| | | | - Qinmei Wang
- School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, 325000, China.
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De Bernardo M, Salerno G, Cornetta P, Rosa N. Axial Length Shortening After Cataract Surgery: New Approach to Solve the Question. Transl Vis Sci Technol 2018; 7:34. [PMID: 30619654 PMCID: PMC6314107 DOI: 10.1167/tvst.7.6.34] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 10/16/2018] [Indexed: 12/11/2022] Open
Abstract
Purpose To check if optical biometry can detect eventual corneal power (Km) and axial length (AL) cataract surgery-related changes that could influence the refractive outcome. Methods Patients scheduled for sequential bilateral cataract surgery between January and September 2017 were included in the present study. One hundred ninety-six eyes of 98 patients (48 males) were selected. Before surgery of the first eye, patients underwent a complete ophthalmic examination, including IOLMaster biometry; the same evaluations were repeated in both eyes the day before the fellow eye cataract surgery, performed at least 2 months after the first one. The differences in Km and AL in the first operated eyes were evaluated, and the fellow eyes were used as controls. Results Km differences in the operated eyes ranged from −1.97 to +0.98 diopter (D) (mean = −0.02 ± 0.36 D) (P = 0.89); in the nonoperated eyes they ranged from −0.6 to +0.7 D (mean = 0 ± 0.20 D) (P = 0.91). The AL differences (pseudophakic option) in the operated eyes ranged from −0.35 to +0.15 mm (mean = −0.10 ± 0.08 mm) (P < 0.001); with the aphakic option they ranged from −0.24 to + 0.26 mm (mean = 0.01 ± 0.08 mm) (P= 0.38). In the nonoperated eyes, the AL differences ranged from −0.04 to +0.06 mm (mean= 0 ± 0.02 mm) (P = 0.02). Conclusions The modern phaco-technique seems not to induce changes in Km and AL, supporting the hypothesis that the differences in AL are due to an incorrect estimation in pseudophakic eyes. Translational Relevance The results of our study may improve the AL measurements in pseudophakic eyes.
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Affiliation(s)
- Maddalena De Bernardo
- Department of Medicine and Surgery, University of Salerno, Baronissi, Salerno, Italy
| | - Giulio Salerno
- Department of Medicine and Surgery, University of Salerno, Baronissi, Salerno, Italy
| | - Palmiro Cornetta
- Department of Medicine and Surgery, University of Salerno, Baronissi, Salerno, Italy
| | - Nicola Rosa
- Department of Medicine and Surgery, University of Salerno, Baronissi, Salerno, Italy
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Lanza M, Koprowski R, Bifani Sconocchia M. Improving accuracy of corneal power measurement with partial coherence interferometry after corneal refractive surgery using a multivariate polynomial approach. Biomed Eng Online 2018; 17:108. [PMID: 30103748 PMCID: PMC6090680 DOI: 10.1186/s12938-018-0542-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 08/09/2018] [Indexed: 11/16/2022] Open
Abstract
Background To improve accuracy of IOLMaster (Carl Zeiss, Jena, Germany) in corneal power measurement after myopic excimer corneal refractive surgery (MECRS) using multivariate polynomial analysis (MPA). Methods One eye of each of 403 patients (mean age 31.53 ± 8.47 years) was subjected to MECRS for a myopic defect, measured as spherical equivalent, ranging from − 9.50 to − 1 D (mean − 4.55 ± 2.20 D). Each patient underwent a complete eye examination and IOLMaster scan before surgery and at 1, 3 and 6 months follow up. Axial length (AL), flatter keratometry value (K1), steeper keratometry value (K2), mean keratometry value (KM) and anterior chamber depth measured from the corneal endothelium to the anterior surface of the lens (ACD) were used in a MPA to devise a method to improve accuracy of KM measurements. Results Using AL, K1, K2 and ACD measured after surgery in polynomial degree 2 analysis, mean error of corneal power evaluation after MECRS was + 0.16 ± 0.19 D. Conclusions MPA was found to be an effective tool in devising a method to improve precision in corneal power evaluation in eyes previously subjected to MECRS, according to our results.
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Affiliation(s)
- Michele Lanza
- Multidisciplinary Department of Medical, Surgical and Dental Sciences, Campania University "Luigi Vanvitelli", Via de Crecchio 16, 80100, Naples, Italy.
| | - Robert Koprowski
- Department of Biomedical Computer Systems, Faculty of Computer Science and Materials Science, Institute of Computer Science, University of Silesia, Sosnowiec, Poland
| | - Mario Bifani Sconocchia
- Multidisciplinary Department of Medical, Surgical and Dental Sciences, Campania University "Luigi Vanvitelli", Via de Crecchio 16, 80100, Naples, Italy
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De Bernardo M, Rosa N. Intraocular pressure after LASEK. Graefes Arch Clin Exp Ophthalmol 2018; 256:2009-2010. [PMID: 29922889 DOI: 10.1007/s00417-018-4047-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 06/12/2018] [Indexed: 10/28/2022] Open
Affiliation(s)
- Maddalena De Bernardo
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Via Salvador Allende, 84081, Baronissi, Salerno, Italy.
| | - Nicola Rosa
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Via Salvador Allende, 84081, Baronissi, Salerno, Italy
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van Dijk K, Rodriguez-Calvo-de-Mora M, van Esch H, Frank L, Dapena I, Baydoun L, Oellerich S, Melles GRJ. Two-Year Refractive Outcomes After Descemet Membrane Endothelial Keratoplasty. Cornea 2017; 35:1548-1555. [PMID: 27661069 DOI: 10.1097/ico.0000000000001022] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To monitor refractive changes after Descemet membrane endothelial keratoplasty (DMEK) and to determine what may influence these changes and the time point of stabilization. METHODS From 67 pseudophakic DMEK eyes operated on for Fuchs endothelial dystrophy at a tertiary referral center, biomicroscopy, visual acuity, subjective refraction, and Scheimpflug-based corneal tomography data were obtained before and up to 2 years postoperatively. Visual acuity and changes in spherical equivalent (SE), mean anterior and posterior simulated keratometry (Km), and central pachymetry were analyzed. RESULTS At 3 months postoperatively, both hyperopic (28/67 eyes) and myopic (21/67 eyes) shifts were observed; 18/67 eyes showed no SE change. The mean change in SE at 3 months was +0.33 diopters (D) (95% confidence interval = [0.11, 0.54], P = 0.028), which stabilized thereafter (P > 0.466). Initial flattening of mean anterior Km by 0.66D (95% confidence interval = [-0.81, -0.51], P < 0.001) at 3 months was followed by a slow steepening, which became significant between 1 and 2 years postoperatively (P < 0.001). Posterior Km stabilized after 3 months (P > 0.252). Preoperative to 3 months postoperative absolute changes in anterior Km were positively related to preoperative backscattered light from the central anterior cornea (P = 0.035), and the presence of partial graft detachment postoperatively (P = 0.013). CONCLUSIONS After DMEK, SE and posterior corneal curvature were on average stable at 3 months after surgery, whereas the mean anterior corneal curvature showed an ongoing gradual change. Changes in anterior corneal curvature may be related to preoperative anterior corneal densitometry or postoperative partial graft detachment.
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Affiliation(s)
- Korine van Dijk
- *Netherlands Institute for Innovative Ocular Surgery, Rotterdam, the Netherlands;†Melles Cornea Clinic Rotterdam, Rotterdam, the Netherlands;‡Hospital Regional Universitario Málaga, Spain; and§Amnitrans EyeBank Rotterdam, Rotterdam, the Netherlands
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Baradaran-Rafii A, Fekri S, Rezaie M, Salehi-Rad S, Moradi A, Motevasseli T, Kalantarion M. Accuracy of Different Topographic Instruments in Calculating Corneal Power after Myopic Photorefractive Keratectomy. J Ophthalmic Vis Res 2017; 12:254-259. [PMID: 28791056 PMCID: PMC5525492 DOI: 10.4103/jovr.jovr_74_16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
PURPOSE To compare the corneal power measurements obtained using different topographic instruments after myopic photorefractive keratectomy (PRK). METHODS Patients with myopia who were candidates for corneal refractive surgery were sequentially included. Pre-PRK and six months post-PRK corneal powers were measured using Javal manual keratometer, Orbscan II, Galilei, Tomey TMS4, and EyeSys 2000 topographers. Measured values were compared with those obtained using the clinical history method (CHM). RESULTS This study included 66 eyes of 33 patients. The lowest keratometric measurements were obtained using the Galilei topographer (42.98 ± 1.69 diopters, D) and the highest measurements were obtained using the Javal manual keratometer (43.96 ± 1.54 D) preoperatively. The same order was observed postoperatively. Effective refractive power (EffRP) measured using EyeSys was most similar to the values obtained using CHM (ICC, intraclass correlation coefficient = 0.951), followed by the total corneal power measured using the Galilei system (ICC = 0.943). The values obtained using the adjusted EffRP formula (EffRP - 0.015*Δ Refraction - 0.05) were more consistent with the values obtained using CHM (ICC = 0.954) compared to those obtained with the adjusted average central corneal power formula measured using the Tomey system (ICC = 0.919). CONCLUSION Post-PRK corneal powers measured using the adjusted EffRP formula were the most similar to values obtained using CHM.
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Affiliation(s)
- Alireza Baradaran-Rafii
- OcularTissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sahba Fekri
- Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Rezaie
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shahram Salehi-Rad
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Moradi
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Tahmineh Motevasseli
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Masumeh Kalantarion
- Department of Medical Education, School of Medical Education, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Koprowski R, Lanza M, Irregolare C. Corneal power evaluation after myopic corneal refractive surgery using artificial neural networks. Biomed Eng Online 2016; 15:121. [PMID: 27846894 PMCID: PMC5111354 DOI: 10.1186/s12938-016-0243-5] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 11/09/2016] [Indexed: 11/30/2022] Open
Abstract
Background Efficacy and high availability of surgery techniques for refractive defect correction increase the number of patients who undergo to this type of surgery. Regardless of that, with increasing age, more and more patients must undergo cataract surgery. Accurate evaluation of corneal power is an extremely important element affecting the precision of intraocular lens (IOL) power calculation and errors in this procedure could affect quality of life of patients and satisfaction with the service provided. The available device able to measure corneal power have been tested to be not reliable after myopic refractive surgery. Methods Artificial neural networks with error backpropagation and one hidden layer were proposed for corneal power prediction. The article analysed the features acquired from the Pentacam HR tomograph, which was necessary to measure the corneal power. Additionally, several billion iterations of artificial neural networks were conducted for several hundred simulations of different network configurations and different features derived from the Pentacam HR. The analysis was performed on a PC with Intel® Xeon® X5680 3.33 GHz CPU in Matlab® Version 7.11.0.584 (R2010b) with Signal Processing Toolbox Version 7.1 (R2010b), Neural Network Toolbox 7.0 (R2010b) and Statistics Toolbox (R2010b). Results and conclusions A total corneal power prediction error was obtained for 172 patients (113 patients forming the training set and 59 patients in the test set) with an average age of 32 ± 9.4 years, including 67% of men. The error was at an average level of 0.16 ± 0.14 diopters and its maximum value did not exceed 0.75 dioptres. The Pentacam parameters (measurement results) providing the above result are tangential anterial/posterior. The corneal net power and equivalent k-reading power. The analysis time for a single patient (a single eye) did not exceed 0.1 s, whereas the time of network training was about 3 s for 1000 iterations (the number of neurons in the hidden layer was 400).
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Affiliation(s)
- Robert Koprowski
- Department of Biomedical Computer Systems, Faculty of Computer Science and Materials Science, Institute of Computer Science, University of Silesia, ul. Będzińska 39, 41-200, Sosnowiec, Poland.
| | - Michele Lanza
- Dipartimento Multidisciplinare di Scienze Mediche, Chirurgiche e Odontoiatriche, Seconda Università di Napoli, Naples, Italy.,Centro Grandi Apparecchiature, Seconda Università di Napoli, Naples, Italy
| | - Carlo Irregolare
- Centro Grandi Apparecchiature, Seconda Università di Napoli, Naples, Italy
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