Emmetropia

‖Em′me‐tro″pi‐a (–mē̍‐trō″pĭ‐ȧ), n. [NL., fr. Gr. ἔμμετροσ in measure, proportioned, suitable (εν̓ in + μέτρον measure) + ὤψ, ωπὄσ, eye.] (Med.) That refractive condition of the eye in which the rays of light are all brought accurately and without undue effort to a focus upon the retina; — opposed to hypermetropia, myopia, and astigmatism.