The Collaborative International Dictionary of English v.0.48:
aniseikonia \aniseikonia\ n. 1. a visual defect in which the shape and size of an ocular image differ in the two eyes. [WordNet 1.5]WordNet (r) 3.0 (2006):
aniseikonia n 1: visual defect in which the shape and size of an ocular image differ in the two eyes