visual acuity









visual acuity


noun Ophthalmology.

  1. acuteness of the vision as determined by a comparison with the normal ability to define certain letters at a given distance, usually 20 feet (6 meters). Abbreviation: V.

n.

  1. Sharpness of vision, especially as tested with a Snellen chart. Normal visual acuity based on the Snellen chart is 20/20.

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