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light adaptation

noun, Ophthalmology.
the reflex adaptation of the eye to bright light, consisting of an increase in the number of functioning cones, accompanied by a decrease in the number of functioning rods (opposed to dark adaptation).
Origin of light adaptation
First recorded in 1895-1900
Related forms
light-adapted, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for light adaptation
Historical Examples
  • To come now to the sense of sight, we have light adaptation, dark adaptation, and color adaptation.

    Psychology Robert S. Woodworth
light adaptation in Medicine

light adaptation n.
The adjustment of the eye under increased illumination, in which the sensitivity to light is reduced. Also called photopic adaptation.

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