Visual Acuity
Ability to discern the details of an object. A normal average eye an angle of one minute of arc (1/60th degree). Assessment of the eye’s ability to distinguish object details and shape, using the smallest identifiable object that can be seen at a specified distance (usually 20 ft. or 16 in.) and letter height (8.87mm).
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Visual Acuity: What is 20/20 Vision?
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