Granular corneal dystrophy type 2 (GCD2) is an autosomal dominant disease affecting vision. Phototherapeutic keratectomy (PTK) is advantageous in removing vision-threatening corneal opacities and postponing keratoplasty; however, it potentially disturbs accurate intraocular lens (IOL) power calculation in cataract surgery. The myopic/hyperopic Haigis-L method with or without the central island has been reported; nevertheless, an optimal method has not yet been established. To compare the predictive accuracy of post-PTK IOL power calculations in GCD2, the retrospective data of 30 eyes from July 2017 to December 2020 were analyzed. All GCD2-affected eyes underwent post-PTK standard cataract surgery using the WaveLight EX500 platform (Alcon Laboratories, Inc., Fort Worth, TX, USA) under a single surgeon. The mean prediction error (MPE) and absolute error (MAE) with the myopic/hyperopic Haigis-L, Barrett Universal II, Barrett True-K, Haigis, and SRK/T by standard keratometry (K) and total keratometry (TK), where possible, were analyzed. Barrett Universal II and SRK/T showed significantly superior MPE, and MAE compared with the myopic/hyperopic Haigis-L method. TK was not significantly superior to K in the same formula. In conclusion, this study suggests that these biometries and formulas, especially Barrett Universal II and SRK/T, are potentially useful in IOL power calculation in GCD2 after PTK.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9861484 | PMC |
| http://dx.doi.org/10.3390/jcm12020584 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Comparison of Optical Biometry Data Measured with Lenstar and Anterion Devices.
Cesk Slov Oftalmol
December 2024
Objective: The aim of this study is to compare the results of preoperative biometric data measured with optical biometers of different generations in patients with cataract. Lenstar optical biometry is based on the principle of optical low-coherence reflectometry (OLCR), and Anterion on swept-source optical coherence tomography (SS-OCT).
Material And Methods: A total of 200 eyes (103 patients) were included in a prospective study at the Faculty Hospital in Trenčín the period from June 2023 to January 2024.
Evaluation of prediction errors in nine intraocular lens calculation formulas using an explainable machine learning model.
BMC Ophthalmol
December 2024
Department of Ophthalmology, Seoul National University Hospital, 101 Daehak-ro, Jongno-gu, Seoul, 03080, Korea.
Background: The purpose of the study was to evaluate the relationship between prediction errors (PEs) and ocular biometric variables in cataract surgery using nine intraocular lens (IOL) formulas with an explainable machine learning model.
Methods: We retrospectively analyzed the medical records of consecutive patients who underwent standard cataract surgery with a Tecnis 1-piece IOL (ZCB00) at a single center. We calculated predicted refraction using the following IOL formulas: Barrett Universal II (BUII), Cooke K6, EVO V2.
Refractive change at 5 years in the Toddler Aphakia and Pseudophakia Study (TAPS).
Ophthalmology
December 2024
Department of Ophthalmology, Mayo Clinic, Rochester, MN; Department of Ophthalmology and Visual Neurosciences, Minneapolis, University of Minnesota, MN;. Electronic address:
Article Synopsis
- The study focuses on refractive changes observed in children aged 5 years who underwent cataract surgery with intraocular lens placement before age 2.
- It analyzed data from 96 children, comparing results between unilateral and bilateral cataract cases, as well as those operated on at different ages (1 to <7 months vs. 7-24 months).
- The findings indicated that children operated on between 1 to <7 months experienced significantly more refractive change compared to those operated on later, suggesting careful consideration is needed when selecting lens power and target refraction for younger patients.
Fluctuations of Anterior Chamber Depth and Astigmatism in Pseudophakic Eyes.
Clin Ophthalmol
December 2024
Department of Refractive Surgery, Eye Clinic Sistina Oftalmologija, Skopje, 1000 Republic of North Macedonia.
Purpose: To explore the significance of changes in anterior chamber depth (ΔACD) and astigmatism between 4 and 8 weeks following uneventful phacoemulsification.
Patients And Methods: Anterior chamber depth (ACD, mm), autorefractometry and subjective refraction were monitored in pseudophakic eyes implanted with non-toric IOLs (group 1, SA60AT, n=36; group 2, SN60WF, n=34; group 3, ICBOO, n=16) and phakic control group (n=30, group 4a, for ACD and autorefractometry) over four weeks. Changes in subjective refractions were compared with repeatability in normal phakic eyes (n=30, group 4b).
Visually relevant on-bench through-focus analysis of intraocular lenses.
Biomed Opt Express
December 2024
Laboratorio de Óptica, Universidad de Murcia, Campus de Espinardo, 30100 Murcia, Spain.
Cataract surgery involves the implantation of an intraocular lens (IOL) to replace the opacified crystalline lens. Monofocal IOLs, the most common type, are intended to have the eye in focus at a given distance, usually at infinity. Simultaneous vision IOLs (SVIOLs) and extended depth of focus (EDOF) aim to minimize postoperative dependence on spectacles by providing either multiple foci or an extended depth of focus.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!