Results 31 to 40 of about 43,431 (244)
Effect of the posterior corneal surface on total corneal astigmatism in patients with age-related cataract [PDF]
International 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
THE AXIS OF ASTIGMATISM. [PDF]
JAMA: The Journal of the American Medical Association, 1905 Twelve years ago 1 I presented some views on the axis of astigmatism. Those views consisted partly of propositions to be verified or denied by experience, partly of facts as developed in my practice. I set forth the initial proposition that the axis of astigmatism does not occur at haphazard, that there is a regularity in its occurrence in a given eye,
openaire +1 more source
Posterior Corneal Characteristics of Cataract Patients with High Myopia.
PLoS 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
BMC 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
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 +6 more
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 +8 more
wiley +1 more source
The contribution of ocular residual astigmatism to anterior corneal astigmatism in refractive astigmatism eyes [PDF]
Scientific Reports, 2021 AbstractTo determine the distribution of ocular residual astigmatism (ORA) in astigmatic eyes and the influence on the anterior corneal (ACA) and refractive astigmatism (RA). A total of 165 children met the inclusion criteria. Right eyes’ data were analyzed. Using Thibos vector analysis to calculate ORA. Spearman correlation analysis was used to obtain
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Prevalence of and factors associated with astigmatism in preschool children in Wuxi City, China
BMC 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