iseikonia
|i-sei-ko-ni-a|
🇺🇸
/ˌaɪsiːˈkoʊniə/
🇬🇧
/ˌaɪsiːˈkəʊniə/
mismatch in image size between eyes
Etymology
'iseikonia' originates from Greek, specifically from the elements 'iso-' meaning 'equal' and 'eikōn' meaning 'image'.
'iseikonia' was formed in modern medical/ophthalmological usage from these Greek roots (via New Latin/modern coinage) to name the phenomenon; related form 'aniseikonia' (with Greek prefix 'an-' meaning 'not' or 'unequal') developed to denote the unequal-image condition.
Originally based on roots meaning 'equal image' (the components described image and equality), it evolved into a technical term referring to the (often unequal) perceived image sizes between the two eyes and the clinical condition arising from that mismatch.
Meanings by Part of Speech
Noun 1
a condition in binocular vision in which the perceived sizes (and sometimes shapes) of images seen by the two eyes differ, often causing double vision, eyestrain, or problems with depth perception.
Iseikonia after eye surgery caused the patient to experience persistent headaches and difficulty judging distances.
Synonyms
Last updated: 2025/09/16 08:10