1 Title : Effect of Uncorrected Astigmatism on Vision
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چکیده
منابع مشابه
Effect of the against the rule myopic astigmatism on the near vision of the elderly.
In the two groups of patients with myopic astigmatism the uncorrected near vision was tested after catatract surgery. Each group with 20 patients ages 60-80. All patients enrolled in study have uncorrected far vision 0.5 or better on Snellen tables. In the first group patients were with the rule after surgery myopic astigmatism (1-1.50 Diopter), and in the second group were patients with agains...
متن کاملPrevalence of high astigmatism, eyeglass wear, and poor visual acuity among Native American grade school children.
PURPOSE The purpose of this study was to examine the prevalence of astigmatism and poor visual acuity and rate of eyeglass wear in grade school children who are members of a Native American tribe reported to have a high prevalence of large amounts of astigmatism. METHODS Vision screening was conducted on 1,327 first through eighth grade children attending school on the Tohono O'odham Reservat...
متن کاملPrevalence of correctable visual impairment in primary school children in Qassim Province, Saudi Arabia.
PURPOSE The worldwide prevalence of refractive errors (RE), which is a common cause of treatable visual impairment among children, varies widely. We assessed the prevalence of correctable visual impairment (uncorrected RE) in primary school children in Qassim, Saudi Arabia. METHODS A cross-sectional study was conducted in 21 primary schools. A total of 5176 children (mean age 9.5±1.8 years), ...
متن کاملAstigmatism impact on visual performance: meridional and adaptational effects.
PURPOSE Astigmatic subjects are adapted to their astigmatism and perceptually recalibrate upon its correction. However, the extent to which prior adaptation to astigmatism affects visual performance, whether this effect is axis dependent, and the time scale of potential changes in visual performance after astigmatism correction are not known. Moreover, the effect of possible positive interactio...
متن کاملEffect of axis orientation on visual performance in astigmatic eyes.
PURPOSE To determine the effect of axis orientation on visual performance in astigmatic eyes. SETTING Department of Ophthalmology, Kitasato University, Kanagawa, Japan. DESIGN Investigational simulation. METHODS Healthy volunteers with no ophthalmic disease other than refractive errors were enrolled. After cycloplegic refraction was fully corrected with a 3.0 mm artificial pupil, with-the...
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تاریخ انتشار 2012