Object Frequency Characteristics of Visual Acuity
نویسندگان
چکیده
منابع مشابه
Spatial frequency sweep pattern reversal VER acuity vs Snellen visual acuity: Effect of optical defocus
The effect of artificially induced image defocusing on visual acuities (VAs) measured by spatial frequency sweep pattern reversal visual evoked response (SPVER) and Snellen measurement was studied in six normal subjects. The steady-state SPVER was recorded using vertical gratings of 10 different spatial frequencies ranging from 0.52 to 30.36 c/deg. The SPVER acuity was compared with Snellen acu...
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In order to evaluate high-frequency VOR function, the effects of different types of motion on visual acuity were evaluated in asymptomatic and symptomatic subjects. A new testing protocol of evaluating vestibular function was developed in an effort to enhance current treatment protocols.
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متن کاملDevelopment of visual acuity.
Catford, G. V., and Oliver, A. (1973). Archives of Disease in Childhood, 48, 47. Development of visual acuity. A hand-held electrically operated instrument has been devised to assess visual acuity by means of the phenomenon of optokinetic fixation nystagmus. An accurate determination of visual acuity has been obtained from an early age, and a graph of the normal visual acuity development produc...
متن کاملDefinition of visual acuity.
IT is well known that different types of test object will give different measures of acuity in terms of the size of the angle subtended at an observer's eye by the critical detail in the test object. Acuity of an average observer may vary from 1" arc, the thickness of a single black line just discernible on a white background, to about 1' arc, the size of a gap in a black ring viewed on a white...
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ژورنال
عنوان ژورنال: Investigative Opthalmology & Visual Science
سال: 2011
ISSN: 1552-5783
DOI: 10.1167/iovs.11-8426