Results 51 to 60 of about 13,852 (253)

Influence of severity and types of astigmatism on visual acuity in school-aged children in southern China [PDF]

open access: yesInternational Journal of Ophthalmology, 2018
AIM: To investigate the influence of astigmatism on visual acuity in school-aged children, and to define a cutoff for clinically significant astigmatism. METHODS: This is a population-based, cross-sectional study.
Li-Li Wang   +3 more
doaj   +1 more source

Refractive error study in young subjects: results from a rural area in Paraguay [PDF]

open access: yes, 2017
AIM: To evaluate the distribution of refractive error in young subjects in a rural area of Paraguay in the context of an international cooperation campaign for the prevention of blindness.
Estrella Lumeras, Miguel Ángel   +4 more
core   +5 more sources

Razões para recusar candidatos à cirurgia refrativa corneana [PDF]

open access: yes, 2002
Purpose: To present how the section of Refractive Surgery of the Federal University of São Paulo assesses the candidates and the reasons to indicate for corneal refractive surgery. Methods: We examined 1626 patients.
Allemann, Norma   +4 more
core   +3 more sources

The Impact of Vision Problems on Households' Incomes: Evidence From the 2019 and 2022 Rounds of the Turkey Health Survey

open access: yesJournal of International Development, EarlyView.
ABSTRACT Vision problems reduce individuals' quality of life, and they also reduce their productivity as workers and consequently decrease their incomes. Most vision problems can be corrected with properly fitted eyeglasses, but many people with vision problems do not have such eyeglasses.
Paul Glewwe   +3 more
wiley   +1 more source

Effectiveness of Patching in Correcting Refractive Errors in Cases with Anisometropic Amblyopia

open access: yesTürk Oftalmoloji Dergisi, 2011
Pur po se: To evaluate the effects of patching on refractive errors in patients with anisometropic amblyopia. Ma te ri al and Met hod: We evaluated retrospectively 81 cases (5-8 years old) which were applied patching treatment for unilateral ...
Aykut Arslan Yıldız, Yavuz Bardak
doaj   +1 more source

High-order myopic coronagraphic phase diversity (COFFEE) for wave-front control in high-contrast imaging systems

open access: yes, 2013
The estimation and compensation of quasi-static aberrations is mandatory to reach the ultimate performance of high-contrast imaging systems. COFFEE is a focal plane wave-front sensing method that consists in the extension of phase diversity to high ...
Dohlen, K.   +4 more
core   +3 more sources

Visual outcomes of Femto-LASIK for correction of residual refractive error after corneal graft [PDF]

open access: yes, 2013
To evaluate the outcomes of the Femto-LASIK method in the treatment of refractive errors following penetrating keratoplasty (PK) at the Persian Eye Clinic, Isfahan, Iran In a prospective, non-comparative case series, 34 consecutive symptomatic eyes of 34
Ghoreishi, Mohammad.   +2 more
core   +1 more source

A review of angle kappa and multifocal intraocular lenses and their effect on visual outcomes

open access: yesActa Ophthalmologica, EarlyView.
Abstract Although most patients are satisfied with their vision after multifocal intraocular lens (IOL) implantation, dissatisfaction has been reported for various reasons, including poor visual outcomes and visual disturbances. Many published reports hypothesise that preoperative angle kappa may be an associated factor in patient dissatisfaction ...
Thomas Kohnen   +2 more
wiley   +1 more source

Peripheral refractive changes associated with myopia progression [PDF]

open access: yes, 2013
Purpose.: To evaluate the changes in peripheral refraction profiles associated with myopia progression and treatment modalities used in the Cambridge Anti-Myopia Study.
Allen, Peter M.   +7 more
core   +1 more source

Reproducibility in the identification of retinal positions on serial fundus photographs: Theory and limitations

open access: yesActa Ophthalmologica, EarlyView.
Abstract Background Imaging of the retina is accompanied by distortions so that positions in fundus photographs cannot be linearly translated to positions in the retinal fundus. The purpose of this study was to describe an algorithm and evaluate its reproducibility in identifying points on the retina from their representation on serial fundus ...
Toke Bek, Giovanni Ometto
wiley   +1 more source

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