Sheridan-Gardiner test for visual acuity.
نویسندگان
چکیده
منابع مشابه
Preschool vision screening: negative predictive value for amblyopia.
BACKGROUND/AIMS Single optotype tests of visual acuity are widely used for preschool vision screening in order to optimise cooperation with testing. These tests may, however, underestimate the visual acuity deficit in amblyopia because they lack visual crowding. This study assessed the resultant negative predictive value (NPV) for amblyopia. METHODS Cohort study of 936 children in the Cambrid...
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PURPOSE To investigate the efficacy of a computerized visual acuity test, the SNU visual acuity test for children. METHODS Fifty-six children, ranging from 1 to 5 years of age, were included. In a dark room, children gazed at and followed a circular dot with 50% contrast moving at a fixed velocity of 10 pixels/sec on a computer monitor. Eye movement was captured using a charge coupled device ...
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VISUAL acuity is determined by the smallest angle at which the eye is able to distinguish two points as separate. It is therefore inversely proportional to the minimum visual angle. The normal visual acuity is found to correspond to an average minimum visual angle of one minute. Thus with relatively small angles one may say that the visual acuity is inversely proportional to the space which sep...
متن کاملThe 'mirror test' for estimating visual acuity in infants.
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ژورنال
عنوان ژورنال: BMJ
سال: 1970
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.2.5701.108