aniseikonia
|an-i-sei-ko-ni-a|
🇺🇸
/ˌænɪsaɪˈkoʊniə/
🇬🇧
/ˌænɪsaɪˈkəʊniə/
unequal image size
Etymology
'aniseikonia' originates from Greek, specifically the prefix 'aniso-' meaning 'unequal' and the word 'eikōn' meaning 'image', combined with the suffix '-ia' to form a medical condition name.
'aniseikonia' was formed in Neo-Latin/medical-Greek from the elements 'aniso-' + 'eikōn' + '-ia' and entered English via medical literature in the late 19th to early 20th century.
Initially it meant 'unequal images (between the two eyes)', and this specific ophthalmologic meaning has been retained in modern usage.
Meanings by Part of Speech
Noun 1
a binocular vision condition in which the perceived sizes of images seen by the two eyes differ (unequal retinal or perceived image size), often causing eyestrain, diplopia, or difficulty with stereopsis.
Aniseikonia can cause eyestrain, headaches, or problems with binocular vision if left uncorrected.
Synonyms
Antonyms
Last updated: 2025/08/12 22:22