- the changes in perception of the relative lightness and darkness of different colors as illumination changes from daylight to twilight.
Origin of Purkinje shift
First recorded in 1970–75; see origin at Purkinje fiber
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- The change in the eye's region of maximal visual acuity as a function of availability of light; in the light-adapted eye the region is in the yellow range whereas in the dark-adapted eye the region is in the green range of the color spectrum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.