Ametropia
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Ametropia is defined as a disproportionately structured eye or a refraction anomaly where there is a mismatch between the power of the refractive apparatus and the length of the eye. Such an eye is unable to focus parallel rays on the retina without accommodation, lacking a far point of clear vision at infinity.
Encyclopedia entry (1928–1936)
AMETROPIA (from Greek a- negative particle, metron measure, and opsis vision), a disproportionately structured eye, a refraction anomaly, in which there is no correspondence between the power of the refractive apparatus and the length of the eye; thus, any eye (myopic, hyperopic) that does not have its far point of clear vision at infinity, i.e., is incapable by its physical structure, without the participation of accommodation, of bringing parallel rays to a focus on the retina, will be ametropic.
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“Ametropia.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/ametropia/