نتایج جستجو برای: anisometropia
تعداد نتایج: 471 فیلتر نتایج به سال:
PURPOSE To determine the effectiveness of weekend atropine for severe amblyopia from strabismus, anisometropia, or both combined among children 3 to 12 years of age. METHODS We enrolled children into 2 prospective, randomized multicenter clinical trials of amblyopia therapy. Herein we report the results for severe amblyopia, 20/125 to 20/400. In Trial 1, 60 children 3 to 6 years of age (mean,...
PURPOSE To use a large wave-front database of a clinical population to investigate relationships between refractions and higher-order aberrations and between aberrations of right and left eyes. METHODS Third- and fourth-order aberration coefficients and higher-order root-mean-squared aberrations (HO RMS), scaled to a pupil size of 4.5-mm diameter, were analyzed in a population of approximatel...
PURPOSE To investigate the association between concomitant esotropia or concomitant exotropia and refractive error in preschool children. METHODS A population-based sample of 5831 children aged 3 to 6 years was selected from all kindergartens in a representative county (Yuhuatai District, Nanjing, Jiangsu Province) of Nanjing, China. Clinical examinations including ocular alignment, ocular mo...
INTRODUCTION Potential indications for excimer laser procedures in children include accommodative esotropia, bilateral high ametropia, and severe anisometropia. Treatment of these conditions has traditionally included spectacle or contact lens use. This treatment, however, is often ineffective in children with severe anisometropia or bilateral ametropia, especially those with neuropsychological...
Purpose: This study aimed to evaluate and compare the long-term surgical complications of scleral buckling (SB), pars plana vitrectomy (PPV), and their combination in pseudophakic retinal detachment (PRD). Methods: This retrospective study included 127 patients who were operated with PRD diagnosis and followed-up for at least 6 months. The patients were divided into 4 groups: Group 1 included c...
OBJECTIVE To investigate risk factors associated with unilateral or bilateral decreased visual acuity (VA) in preschool children. DESIGN Population-based, cross-sectional prevalence study. PARTICIPANTS Population-based samples of 6504 children ages 30 to 72 months from California and Maryland. METHODS Participants were preschool African-American, Hispanic, and non-Hispanic white children ...
In eccentric photorefraction, light returning from the retina of the eye is photographed by a camera focused on the eye's pupil. We use a geometrical model of eccentric photorefraction to generate intensity profiles across the pupil image. The intensity profiles for three different monochromatic aberration functions induced in a single eye are predicted and show good agreement with the measured...
In the clinical refraction of the eye, aniseikonia and anisometropia are inevitably used terms. Image formation and its retinal size is the function of the power of the dioptric eye system. However, the correcting lens in front of the eye and the eye optical system represent a unique optical afocal system, in which the distance between correcting lens and corneal vertex is of utmost importance,...
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