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Visual acuity (VA) commonly refers to the clarity of vision, but technically rates an examinee's ability to recognize small details with precision. Visual acuity is dependent on optical and neural ...

Visual acuity--the ability to discern letters, numbers, and objects from a distance--is essential for many tasks, from recognizing a friend across a room to driving a car. Researchers previously ...

Apostilb: A unit of luminance referred to in the SSA listings. Applicability: The extent to which the results of a perimetry technique can be generalized to the target population and setting for which ...