afterimage(redirected from negative image)
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a visual impression persisting briefly after cessation of the stimuli causing the original image. In a positive afterimage the brights, darks, and colors remain unchanged; in a negative afterimage the brights and darks are reversed, and the colors are complementary.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
Persistence of a visual response after cessation of a stimulus.
Farlex Partner Medical Dictionary © Farlex 2012
A visual image that persists after the visual stimulus causing it has ceased to act. Also called photogene.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
AfterimageA visual sensation that persists briefly when the eyes are turned toward a homogenous neutral background after visual stimulation. Afterimage is due to photochemical activity of the retina and may be negative, positive, or complementary.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
af·ter·im·age, after-image (af'tĕr-im'ăj)
Persistence of a visual response after cessation of the stimulus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012