Wernicke's reaction


Also found in: Dictionary, Thesaurus, Financial, Encyclopedia.

Wernicke's reaction

n.
A reaction seen in hemianopsia in which the pupil constricts when light is directed to the normal side of the retina, but fails to constrict when light is directed to the retina's blind side. Also called hemiopic pupillary reaction, Wernicke's sign.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.