Results 11 to 20 of about 30,062 (169)

Comparison of corneal irregular astigmatism by the type of corneal regular astigmatism

open access: yesScientific 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   +5 more
doaj   +1 more source

Effect of the posterior corneal surface on total corneal astigmatism in patients with age-related cataract [PDF]

open access: yesInternational Journal of Ophthalmology, 2018
AIM: To explore the effect of the posterior astigmatism on total corneal astigmatism and evaluate the error caused by substituting the corneal astigmatism of the simulated keratometriy (simulated K) for the total corneal astigmatism in age-related ...
Ying-Ying Jin   +4 more
doaj   +1 more source

Posterior Corneal Characteristics of Cataract Patients with High Myopia.

open access: yesPLoS ONE, 2016
PurposeTo evaluate the characteristics of the posterior corneal surface in patients with high myopia before cataract surgery.MethodsWe performed a cross-sectional study at the Eye and ENT Hospital of Fudan University, Shanghai, China. Corneal astigmatism
Qinghe Jing   +4 more
doaj   +1 more source

Postoperative Corneal and Surgically Induced Astigmatism following Superior Approach Manual Small Incision Cataract Surgery in Patients with Preoperative Against-the-Rule Astigmatism

open access: yesJournal 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   +6 more
doaj   +1 more source

Eyelid squinting improves near vision in against-the-rule and distance vision in with-the-rule astigmatism in pseudophakic eyes: an eye model experimental study

open access: yesBMC Ophthalmology, 2020
Background To elucidate whether eyelid squinting improves near and distance vision in against-the-rule (ATR) and with-the-rule (WTR) simple myopic astigmatism in pseudophakic eyes. Methods A refraction-model eye was mounted on a wavefront analyzer.
Jay Won Rhim   +5 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]

open access: yesInternational 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

Prevalence of and factors associated with astigmatism in preschool children in Wuxi City, China

open access: yesBMC Ophthalmology, 2022
Purpose To investigate the status of astigmatism in preschool children in Wuxi City, and explore the risk factors related to astigmatism. The risk factors related to astigmatism development as predictors can help us identify preschool children who need ...
Zhihui Yang   +6 more
doaj   +1 more source

Changes in astigmatism after horizontal muscle recession strabismus surgery: A retrospective cohort study

open access: yesIndian Journal of Ophthalmology, 2021
Purpose: The aim of this study was to evaluate the changes in astigmatism after unilateral recession of horizontal rectus muscles in pediatric patients.
Christina Karakosta   +7 more
doaj   +1 more source

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

open access: yesClinical 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   +4 more
doaj  

Comparison of penetrating femtosecond laser-assisted astigmatic keratotomy and toric intraocular lens implantation for correction of astigmatism in cataract surgery

open access: yesScientific Reports, 2021
This study tried to compare the clinical outcomes of femtosecond laser-assisted astigmatic keratotomy (FSAK) and toric intraocular lens (IOL) implantation for astigmatism correction and identify factors affecting the efficacy of FSAK and toric IOL ...
Hoon Noh   +4 more
doaj   +1 more source

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