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visual acuity

noun, Ophthalmology.
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.
Origin of visual acuity
First recorded in 1885-90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for visual acuity
Historical Examples
  • Nor did Hans possess anything like that high degree of visual acuity which had been attributed to him.

    Clever Hans Oskar Pfungst
visual acuity in Medicine

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

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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