PURPOSE To determine which measures of the binocular visual field correlate best with the patient's assessment of vision. METHODS Esterman binocular visual field testing and four other binocular visual field tests (designated peripheral 20 dB [p20], peripheral 22 dB [p22], central 24 dB [c24] and central 26 dB [c26]) were performed in 101 patients with glaucoma or suspected glaucoma. Scores f...

purpose : to evaluate the incidence of leber’s congenital amaurosis (lca) in low vision children referred to electrophysiology ward of farabi eye hospital , and review the clinical features of disease and electroretiongraphy (erg) test values to confirm the diagnosis and severity of the disease in iran . design: prospective observational case series methods : two-hundred and fifteen cases of lo...

Background: Some post-LASIK patients complain of blurry distance vision months after refractive surgery, despite good corneal healing and negligible refractive error. We postulated that perceiving blur in the absence of refractive error or significant monocular aberrations might result from poor binocular control. Binocular vision testing in a series of such patients revealed convergence proble...

PURPOSE The latency of adaptation of the human vergence system to a change in convergence or divergence forced upon it by a prism was investigated in this pilot study. METHODS Adaptation was stimulated by a 5-s period of binocular vision through a prism of 0 delta, -8 delta, or 8 delta. Immediately thereafter and for a further period of 45 s, lateral heterophoria was monitored subjectively by...

PURPOSE To compare which parameter category (wavefront data, psychophysical data, or subjective symptoms) predicts best subjective quality of vision after LASIK. METHODS Twenty-eight eyes (15 patients) were included. Twenty-three eyes (12 patients) underwent uneventful LASIK; 5 eyes (3 patients) were symptomatic eyes treated with myopic LASIK elsewhere. Mean preoperative spherical equivalent ...

CONTEXT: Screening could identify preschool-aged children with vision problems at a critical period of visual development and lead to treatments that could improve vision. OBJECTIVE: To determine the effectiveness of screening preschoolaged children for impaired visual acuity on health outcomes. METHODS: We searched Medline from 1950 to July 2009 and the Cochrane Library through the third quart...

SIGNIFICANCE This report describes the first clinical use of the Ohio Contrast Cards, a new test that measures the maximum spatial contrast sensitivity of low-vision patients who cannot recognize and identify optotypes and for whom the spatial frequency of maximum contrast sensitivity is unknown. PURPOSE To compare measurements of the Ohio Contrast Cards to measurements of three other vision ...

INTRODUCTION Irreversible and severe visual loss may represent the end of long lasting diabetic retin-opathy. The progression of visual impairment and the quantification of final residual visual function are currently determined by means of diagnostic tests which rely on the physiological and mathematical principles of psychophysics. The best known among these tests is the quantification of vis...

Background: The diagnostic methods which are used for acute ocular toxoplasmosis are very important; if the treatment is delayed, it sometimes leads to loss of vision. Fewstudies have been performed to evaluate serological tests used in the diagnosis of acute ocular toxoplasmosis. Objective: To evaluate the immunoglobulin (Ig) M, G and IgG avidity tests for dia...

BACKGROUND Individual experimental data suggest that visual input during tactile stimulation enhances tactile appreciation - whether this finding is replicated across studies and across body sites is unknown. OBJECTIVE To determine the available evidence as to whether non-informative vision of the body has an effect on tactile acuity. METHODS Studies that assessed tactile acuity with vision...