Results 11 to 20 of about 108,431 (221)

Studying the contribution of posterior corneal astigmatism to total corneal astigmatism

Journal of the Egyptian Ophthalmological Society, 2015
Settings The Faculty of Medicine, Alexandria University, Egypt. Purpose The aim of this work was to study the contribution of posterior corneal astigmatism to total corneal astigmatism.
Hany Ahmed Helaly
doaj   +3 more sources

Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism [PDF]

Scientific Reports, 2021
We investigated the relation between corneal regular and irregular astigmatism in normal human eyes. In 951 eyes of 951 patients, corneal irregular astigmatism, such as asymmetry and higher-order irregularity components, was calculated using the Fourier ...
Yuta Ueno, Risa Nomura, Takahiro Hiraoka, Katsuhito Kinoshita, Mutsuko Ohara, Tetsuro Oshika   +5 more
doaj   +3 more sources

Effects of chalazia on corneal astigmatism [PDF]

BMC Ophthalmology, 2017
Background A chalazion is a common eyelid disease that causes eye morbidity due to inflammation and cosmetic disfigurement. Corneal topographic changes are important factors in corneal refractive surgery, intraocular lens power calculations for cataract ...
Ki Won Jin, Young Joo Shin, Joon Young Hyon   +2 more
doaj   +2 more sources

Age Differences in Axial Length, Corneal Curvature, and Corneal Astigmatism in Marfan Syndrome with Ectopia Lentis

Journal of Ophthalmology, 2018
Purpose. To investigate the differences in axial length, corneal curvature, and corneal astigmatism with age in patients with Marfan syndrome (MFS) and ectopia lentis. Methods. A retrospective case series study was conducted.
Jiahui Chen, Qinghe Jing, Yating Tang, Dongjin Qian, Yi Lu, Yongxiang Jiang   +5 more
doaj   +2 more sources

Contribution of Posterior Corneal Astigmatism to Total Corneal Astigmatism in a Sample of Egyptian Population

Clinical Ophthalmology, 2020
Mohamed Hosny, Alaa Badawy, Lobna Khazbak, Mohamed Anis, Sarah Azzam Ophthalmology, Cairo University, Giza, EgyptCorrespondence: Mohamed HosnyOphthalmology, Cairo University, 84 Shehab Street, Mohandeseen, Giza 12411, EgyptTel +20 1000007675Email ...
Hosny M, Badawy A, Khazbak L, Anis M, Azzam S   +4 more
doaj   +4 more sources

Anterior and Posterior Corneal Astigmatism after Refractive Lenticule Extraction for Myopic Astigmatism [PDF]

Journal of Ophthalmology, 2015
Purpose. To assess the amount and the axis orientation of anterior and posterior corneal astigmatism after refractive lenticule extraction (ReLEx) for myopic astigmatism. Methods. We retrospectively examined 53 eyes of 53 consecutive patients (mean age ±
Kazutaka Kamiya, Kimiya Shimizu, Mayumi Yamagishi, Akihito Igarashi, Hidenaga Kobashi   +4 more
doaj   +2 more sources

Effect of Chalazion on Corneal Astigmatism [PDF]

, 2023
A common eyelid disease chalazion causes eye morbidity due to inflammation and cosmetic disfigurement.  Important factors in corneal refractive surgery, intraocular lens power calculations for cataract surgery and visual acuity assessments are ...
G, Taarika, Veeramani, Panimalar A, Ramakrishnan, Abinaya   +2 more
core   +1 more source

Predicting Residual Astigmatism in Cataract Surgery

Vision, 2022
The purpose of this review is to evaluate the prediction of postoperative residual astigmatism and to determine the best prediction method for astigmatism correction.
Atsushi Kawahara
doaj   +1 more source

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, Kathryn Richdale, Erin S Tomiyama, Chuan Hu, Anna‐Kaye M Logan, Kelsea Skidmore, Moriah A Chandler, Eric R Ritchey, James S Wolffsohn   +8 more
wiley   +1 more source

Leftover Astigmatism: The Missing Link Between Measured and Calculated Posterior Corneal Astigmatism

, 2022
Purpose:To quantify the total eye astigmatism that is not accounted for by measurement of anterior corneal astigmatism and posterior corneal astigmatism and knowledge of intraocular lens (IOL) astigmatism and assess whether it is correlated with ...
Roggia, Murilo F., Murilo F. Roggia, Chen, Tony S., Beheregaray, Simone, Esterman, Adrian, Adrian Esterman, Benjamin R. LaHood, Simone Beheregaray, Michael Goggin, LaHood, Benjamin R., Goggin, Michael, Tony S. Chen   +11 more
core   +1 more source