English Lexicon

Emmetropia

/ˌɛm.ɪˈtroʊ.pi.ə/
nounCEFR C2 (Proficient)Top #14500 frequency
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Comprehensive Definitions & Senses

2 senses
As noun
  1. 1

    The normal condition of the eye in which visual refraction is balanced and images focus precisely on the retina without refractive error.

    "An eye test confirmed complete emmetropia, meaning he requires no glasses or contact lenses."
  2. 2

    Normal vision state in ophthalmology characterized by the absence of myopia, hyperopia, or astigmatism.

    "The ophthalmologist noted that true emmetropia is relatively rare in the modern population."

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Antonyms & Contrasting Words (2)

Linguistic Origin & Historical Etymology

Derived from Modern Latin, coined in the late 19th century from Ancient Greek emmetros (in measure, proportioned) + ops (eye). It describes the optical condition of a normal, healthy eye where parallel rays are accurately focused on the retina without needing corrective lenses.

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