Results 21 to 30 of about 17,272 (178)

Impact of corneal astigmatism on refractive outcomes after phacoemulsification with implantation of a spherical IOL

Journal of Ophthalmology, 2021
Background: To date, particular emphasis is being put to correction of preoperative corneal astigmatism in phacoemulsification, since approximately 30% of the world’s population has astigmatism of at least 0.75D which results in decreased visual acuity ...
N. G. Zavgorodnia, V. Iu. Novikova
doaj   +1 more source

Managing Corneal Astigmatism

UP Journal of Ophthalmology, 2023
Corneal astigmatism is a refractive error that creates an asymmetric blur in the vision. Corneal astigmatism can arise from trauma, disease, following surgery, or be congenital. In assessing corneal astigmatism, a decision should be made as to whether the astigmatic pattern is regular or irregular.
openaire   +1 more source

Regular and irregular astigmatism of bullous keratopathy using Fourier harmonic analysis with anterior segment optical coherence tomography

Scientific Reports, 2022
Bullous keratopathy (BK) is known to present with corneal edema and Descemet's folds, which can cause corneal astigmatism. However, no report quantitatively evaluated BK astigmatism by separating it into regular and irregular astigmatism.
Lily Wei Chen, Takashi Ono, Yumi Hashimoto, Miki Tsuneya, Yuito Abe, Takashi Omoto, Yukako Taketani, Tetsuya Toyono, Makoto Aihara, Takashi Miyai   +9 more
doaj   +1 more source

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  

Toric intraocular lens implantation in cataract patients with corneal opacity

BMC Ophthalmology, 2020
Background To evaluate the effect of toric intraocular lens implantation in cataract patient with corneal opacity and high astigmatism. Methods Thirty-one eyes of 31 patients who underwent cataract surgery with toric intraocular lens implantation were ...
Ho Ra, Ho Sik Hwang, Hyun Seung Kim, Man Soo Kim, Eun Chul Kim   +4 more
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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
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Postoperative Corneal and Surgically Induced Astigmatism following Superior Approach Manual Small Incision Cataract Surgery in Patients with Preoperative Against-the-Rule Astigmatism

Journal of Ophthalmology, 2016
The aim of the study was to report postoperative corneal and surgically induced astigmatism (SIA) in patients with preoperative against-the-rule (ATR) astigmatism who underwent superior approach manual small incision cataract surgery (MSICS).
Edmund Arthur, Ahmed Abdul Sadik, David Ben Kumah, Eugene Appenteng Osae, Felix Agyemang Mireku, Frank Yeboah Asiedu, Reynolds Kwame Ablordeppey   +6 more
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Corneal Astigmatism Measurements Comparison among Ray-Tracing Aberrometry, Partial Coherence Interferometry, and Scheimpflug Imaging System

Journal of Ophthalmology, 2020
Purpose. To investigate interdevice agreement among corneal topography/ray-tracing aberrometry (iTrace), partial coherence interferometry (IOLMaster), and Scheimpflug imaging (Pentacam) for the measurement of corneal astigmatism. Methods.
Yaqin Zhang, Jing Dong, Suhua Zhang, Bin Sun, Xiaoliang Wang, Maolong Tang, Xiaogang Wang   +6 more
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Effect of 1.8-mm steep-axis clear corneal incision on the posterior corneal astigmatism in candidates for toric IOL implantation

BMC Ophthalmology, 2020
Background In the present study, we aimed to analyze the effects of cataract surgery using a 1.8-mm steep-axis clear corneal incision (CCI) on the posterior corneal surfaces based on the keratometry from the rotating Scheimpflug imaging device (Pentacam ...
Xi Li, Xiang Chen, Suhong He, Wen Xu
doaj   +1 more source

Corneal Astigmatism in Cataract

Journal of the College of Physicians and Surgeons Pakistan
To measure preoperative corneal astigmatism in cataract patients.Descriptive study. Place and Duration of the Study: Mughal Eye Hospital, Lahore, from 2018 to 2022.The amount of preoperative corneal astigmatism was noted in cataract patients. Inclusion criteria included cataract patients above 16 years of age.
Khawaja Khalid, Shoaib, Tariq, Shakoor
openaire   +2 more sources