emmetropia

emmetropia
The state of refraction of the eye in which parallel rays, when the eye is at rest, are focused exactly on the retina. [G. emmetros, according to measure, + ops, eye]

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em·me·tro·pia .em-ə-'trō-pē-ə n the normal refractive condition of the eye in which with accommodation relaxed parallel rays of light are all brought accurately to a focus upon the retina compare ASTIGMATISM, MYOPIA
em·me·trop·ic -'träp-ik, -'trōp- adj

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n.
the state of refraction of the normal eye, in which parallel light rays are brought to a focus on the retina with the accommodation relaxed. Distant objects are seen clearly without any effort to focus. Compare ametropia, hypermetropia, myopia.

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em·me·tro·pia (em″ə-troґpe-ə) [Gr. emmetros in proper measure + -opia] a state of proper correlation between the refractive system of the eye and the axial length of the eyeball, rays of light entering the eye parallel to the optic axis being brought to a focus exactly on the retina. emmetropic adj

Emmetropia.


Medical dictionary. 2011.

Look at other dictionaries:

  • Emmetropia — (from the Greek emmetros, well proportioned, fitting ) describes the state of vision where an object at infinity is in sharp focus with the eye lens in a neutral or relaxed state. This condition of the normal eye focuses rays exactly on the… …   Wikipedia

  • Emmetropia — Em me*tro pi*a ([e^]m m[ e]*tr[=o] p[i^]*[.a]), n. [NL., fr. Gr. e mmetros in measure, proportioned, suitable ( en in + me tron measure) + w ps, wpo s, eye.] (Med.) That refractive condition of the eye in which the rays of light are all brought… …   The Collaborative International Dictionary of English

  • emmetropia — /em:etro pia/ s.f. [comp. del gr. émmetros di giusta misura e opia ]. (med.) [normale capacità visiva] ◀▶ astigmatismo, miopia, presbiopia …   Enciclopedia Italiana

  • emmetropia — [em΄ə trō′pē ə] n. [ModL < Gr emmetros, in measure, fit < en , in + metron, MEASURE + OPIA] the condition of normal refraction of light in the eye, in which vision is perfect emmetropic [em΄əträp′ik] adj …   English World dictionary

  • emmetropia — normalusis regėjimas statusas T sritis fizika atitikmenys: angl. emmetropia; normal vision vok. Emmetropie, f; Normalsichtigkeit, f; Rechtsichtigkeit, f rus. нормальное зрение, n; эмметропия, f pranc. emmétropie, f; vision normale, f …   Fizikos terminų žodynas

  • emmetropia — emmetrope, n. emmetropic /em i trop ik, troh pik/, adj. /em i troh pee euh/, n. Ophthalm. the normal refractive condition of the eye, in which the rays of light are accurately focused on the retina. [1860 65; < NL, equiv. to emmetr (s. of Gk… …   Universalium

  • emmetropia — noun The condition of perfect vision, where images are correctly brought to a focus on the retina …   Wiktionary

  • emmetropia — em·me·tro·pì·a s.f. TS med. normale capacità di rifrazione dell occhio Contrari: ametropia. {{line}} {{/line}} DATA: 1875. ETIMO: comp. del gr. émmetros di giusta misura e di opia …   Dizionario italiano

  • emmetropia — {{hw}}{{emmetropia}}{{/hw}}s. f. Vista normale …   Enciclopedia di italiano

  • emmetropia — pl.f. emmetropie …   Dizionario dei sinonimi e contrari

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