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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
1885-90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for visual acuity
  • There is evidence that anthocyanins also have anti-inflammatory activity, promote visual acuity, and hinder obesity and diabetes.
  • Humans' sense of hearing and smell are greatly atrophied in favor of visual acuity.
  • In addition to their excellent visual acuity, turkeys also have awesome peripheral vision.
  • After all, it can be made and appreciated without much knowledge of art history or much visual acuity.
  • There may also be abnormal pupil responses, decreased visual acuity, and other changes.
  • visual acuity drops from the age of thirty, and drivers grow sensitive to glare, it reports.
  • visual acuity is the finest spatial detail which may be perceived.
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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