نتایج جستجو برای: visual acuity
تعداد نتایج: 363021 فیلتر نتایج به سال:
A 44 year old woman presented with decreased vision and floaters, started since 4 days before, in her right eye referred to our ophthalmology clinic. On examination, it was found that the best corrected visual acuity was limited to R-E: 20/80 and that of the left eye: 20/20. Fundus examination of the right eye revealed a rhegmatogenous subclinical retinal detachment and vitreous hemorrhage 15 m...
Background and Objective: Pterygium is a common ocular surface disorder. A number of surgical procedures are used to remove it. The purpose of this study was to compare recurrent, visual acuity and intraocular pressure after pterygium surgery using mitomycin C during and after surgery. Materials and Methods: In this interventional study, 119 patients with indications for pterygium surgery were ...
Purpose: To evaluate the effect of occlusion therapy on visual acuity in children and adolescents (aged 5-13 years) with amblyopia. Methods: This experimental study followed a pretest-posttest design. Totally, 72 people with amblyopic eyes (visual acuity between 20/100 and 20/25) were selected through convenient sampling. The visual acuity was assessed at 1, 3, and 6 months after starting occlu...
BACKGROUND Patients with initially low visual acuity were excluded from the therapy approval studies for retinal vein occlusion. But up to 28 % of patients presenting with central retinal vein occlusion have a baseline BCVA of less than 34 ETDRS letters (0.1). The purpose of our study was to assess visual acuity and central retinal thickness in patients suffering from central retinal vein occlu...
The pattern electroretinogram (PERG) was used to measure the visual acuity and refractive state of nine American kestrels (Falco sparverius). Visual acuity was determined from psychometric functions of PERG amplitude vs. spatial frequency. Refractive state was measured by finding the trial lens that resulted in the highest acuity. All nine kestrels were found to be emmetropic. Their median visu...
PURPOSE To evaluate the visual acuity (VA) measurement by Snellen chart at three main Ophthalmology centers in Curitiba, compare these measurements with a computerized method for calibrating VA and also with the standard theory developed by Hermann Snellen. METHODS Descriptive study including 15 Ophthalmology clinics and a computerized method to measure the VA. Using a tape measure and a cali...
Background and Objective:Patients with Alzheimer's disease have impaired visual function even in the early stages of the disease. Therefore, the present study aimed to determine the visual signs and symptoms in patients with Alzheimer's disease and compare them with those in the control group. Materials and Methods:This cross-sectional descriptive study was conducted on 19 Alzheimer patients a...
PURPOSE To compare visual acuity results obtained by use of the Lea Symbols chart with results obtained with Early Treatment Diabetic Retinopathy Study (ETDRS) charts in young children who are members of a population with a high prevalence of astigmatism. METHODS Subjects were 438 children ages 5 through 7 years who were enrolled in kindergarten or first grade on the Tohono O'odham Reservatio...
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