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[em-i-troh-pee-uh] /ˌɛm ɪˈtroʊ pi ə/
noun, Ophthalmology.
the normal refractive condition of the eye, in which the rays of light are accurately focused on the retina.
Origin of emmetropia
1860-65; < New Latin, equivalent to emmetr- (stem of Greek émmetros in measure, equivalent to em- em-2 + métr(on) measure + -os adj. suffix) + -opia -opia
Related forms
emmetrope, noun
[em-i-trop-ik, -troh-pik] /ˌɛm ɪˈtrɒp ɪk, -ˈtroʊ pɪk/ (Show IPA),
adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for emmetrope


the normal condition of perfect vision, in which parallel light rays are focused on the retina without the need for accommodation
Derived Forms
emmetropic (ˌɛmɪˈtrɒpɪk) adjective
Word Origin
C19: from New Latin, from Greek emmetros in due measure + -opia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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emmetrope in Medicine

emmetropia em·me·tro·pi·a (ěm'ĭ-trō'pē-ə)
The condition of the normal eye when parallel rays are focused exactly on the retina and vision is perfect.

em'me·trop'ic (-trŏp'ĭk, -trō'pĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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