isometropic
|i-so-me-trop-ic|
🇺🇸
/ˌaɪsoʊməˈtrɑpɪk/
🇬🇧
/ˌaɪsəʊməˈtrɒpɪk/
equal refractive power
Etymology
'isometropic' originates from Greek roots: 'isos' meaning 'equal' and medical-latinized 'metropia' (from Greek 'metron' 'measure' and 'ōps' 'eye'), combined in modern medical English to describe equality of refraction.
'isometropic' was formed in modern medical/technical English (19th–20th century) from the Greek-derived term 'isometropia' (the noun for equal refraction) and the adjectival suffix '-ic'; it entered specialist ophthalmic usage by analogy with 'anisometropic'.
Initially composed to mean 'having equal measurement' (literal sense from Greek roots), it has come to be used specifically in ophthalmology and optics to mean 'having equal refractive power' or 'not differing between eyes or meridians'.
Meanings by Part of Speech
Adjective 1
(ophthalmology) Having approximately equal refractive power in both eyes; not exhibiting clinically significant anisometropia.
The child was isometropic, so both eyes were prescribed the same spherical correction.
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Adjective 2
(general/optical, less common) Having uniform refractive properties (or equal optical power) across meridians or directions; essentially not astigmatic or directionally variable in refractive effect.
A perfectly isometropic lens would focus light the same way in every meridian.
Synonyms
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Last updated: 2025/09/18 07:10