1) Vision defect 2) Visual defect 3) Visual disorder 4) Visual impairment 
Aniseikonia is an ocular condition where there is a significant difference in the perceived size of images. It can occur as an overall difference between the two eyes, or as a difference in a particular meridian. ==Etymology== Gr. `an` = `not`, + `is(o)` = `equal,` + `eikōn` = `image` ==Causes== Retinal image size is determined by man...
A condition in which the ocular image of an object as seen by one eye differs in size and shape from that seen by the other. ... (12 Dec 1998) ... 
(an″is-i-ko´ne-ә) inequality of the retinal images of the two eyes.
Type: Term Pronunciation: an′ĭ-sī-kō′nē-ă Definitions: 1. An ocular condition in which the image of an object in one eye differs in size or shape from the image of the same object in the other eye. Synonyms: unequal retinal image
[n] - visual defect in which the shape and size of an ocular image differ in the two eyes
aniseikonia, aniseikonic A defect of vision marked by the presence of unequal images in each eye.
noun visual defect in which the shape and size of an ocular image differ in the two eyes
[Difficult words] visual defect in which the shape and size of an ocular image differ in the two eyes[Obscure words] visual defect in which the shape and size of an ocular image differ in the two eyes