Comparison of Total Corneal Astigmatism between IOLMaster and Pentacam [PDF]
BioMed Research International, 2022 Purpose. To compare the total corneal astigmatism (TCA) measured by IOLMaster 700 and Pentacam and to investigate the consistency of corneal keratometry (CK) measured by IOLMaster and Pentacam. Methods. Cataract patients were retrospectively enrolled in March and April, 2021.
Xiaochun Li, Xiaoguang Cao, Yongzhen Bao
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Analysis of total corneal astigmatism with a rotating Scheimpflug camera in keratoconus [PDF]
BMC Ophthalmology, 2020 Abstract Background To analyze mean corneal powers and astigmatisms on anterior, posterior, and total cornea in patients with keratoconus as calculated according to various keratometric measurements using a Scheimpflug camera. Methods We examined the left eyes of 64 patients (41 males and 23 females; mean age 29.94 ± 6.63 years) with keratoconus.
Jinho Kim +2 more
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Calculation of the total corneal astigmatism using the virtual cross cylinder method on the secondary principal plane of the cornea [PDF]
Scientific ReportsThis study aimed to establish a virtual cross cylinder method to calculate the total corneal astigmatism by combining the anterior and posterior corneal astigmatism on the secondary principal plane of the cornea based on Gaussian optics.
Yukitaka Danjo
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Analysis of differences between keratometric astigmatism and total corneal astigmatism measured by IOLMaster 700 [PDF]
International OphthalmologyTo compare keratometric astigmatism (ΔK) and total corneal astigmatism (ΔTK) calculated by the IOLMaster 700 in cataract cases with regular corneal astigmatism ≥ 0.75 diopters (D).This study was a secondary analysis of a database of cataract patients who had undergone examination with IOLMaster 700 between May 2021 and March 2022 at Shanghai Eye ...
Yu, Chunxia +5 more
openaire +3 more sources
Optimizing IOL Calculators with Deep Learning Prediction of Total Corneal Astigmatism [PDF]
Journal of Clinical MedicineBackground/Objectives: This study aims to identify the most accurate regression model for predicting total corneal astigmatism (TCA) from anterior corneal astigmatism (ACA) and to fine-tune the best model’s architecture to further optimize predictive accuracy.
Avi Wallerstein +6 more
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Age- and gender-related characteristics of astigmatism in a myopic population
Frontiers in Medicine, 2022 PurposeTo explore age- and gender-related differences of refractive and corneal astigmatism in myopic patients looking for refractive surgery.DesignA retrospective cross-sectional study.Materials and methodsThe medical files of candidates looking for ...
Shan Yang, Yang Jiang, Ge Cui, Ying Li
doaj +1 more source
Multivariate Regression Analysis to Predict Postoperative Refractive Astigmatism in Cataract Surgery
Journal of Ophthalmology, 2020 Purpose. To assess the correlation between postoperative refractive astigmatism and preoperative parameters in cataract surgery. Methods. Left eyes of 100 consecutive patients scheduled for cataract surgery with a 2.4 mm clear corneal incision were ...
Atsushi Kawahara +2 more
doaj +1 more source
Effect of femtosecond laser-assisted steepest-meridian clear corneal incisions on preexisting corneal regular astigmatism at the time of cataract surgery [PDF]
International Journal of Ophthalmology, 2020 AIM: To investigate the clinical efficacy and safety of femtosecond laser-assisted steepest-meridian clear corneal incisions for correcting preexisting corneal astigmatism performed at the time of cataract surgery.
Wei Chen +7 more
doaj +1 more source
Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism among Saudi Population
The Open Ophthalmology Journal, 2023 Background: Astigmatism is an error of refraction in which incident parallel rays cannot be focused on a single point. It could be corneal astigmatism (CA), lenticular astigmatism (LA), or both. Regarding CA, it is due to the difference in the corneal curvature in the different meridians of both the anterior and posterior surfaces.
Rania Fahmy, Sarah Alandas
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Near visual function measured with a novel tablet application in patients with astigmatism
Clinical and Experimental Optometry, EarlyView., 2020 Clinical relevance While the clinical focus of performance metrics is traditionally based on visual acuity, research from the field of visual impairment has demonstrated that metrics such as reading speed and critical print size correlate much more strongly with subjective patient reported outcomes and assessed ability in real‐world tasks.
Ananya Datta +8 more
wiley +1 more source