[ an-uh-sahy-koh-nee-uh ]
/ ˌæn ə saɪˈkoʊ ni ə /

noun Ophthalmology.

a defect of vision in which the images at the retinas are unequal in size.

Origin of aniseikonia

From New Latin, dating back to 1930–35; see origin at aniso-, eikon, -ia

Related forms

an·is·ei·kon·ic [an-uh-sahy-kon-ik] /ˌæn ə saɪˈkɒn ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for aniseikonia


/ (ˌænaɪsaɪˈkəʊnɪə) /


a condition caused by a defect in the lens of the eye in which the images produced in the two eyes differ in size or shape

Derived Forms

aniseikonic, adjective

Word Origin for aniseikonia

C20: New Latin, from aniso- + Greek eikon image
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for aniseikonia


[ ăn-ī′sī-kōnē-ə ]


A condition in which the shape and size of the ocular image differ in each eye.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.