Path. [mod.L., f. Gr. ἄμετρος irregular (f. ἀ priv. + μέτρον measure) + ὤψ, ὦπ-α, eye + -ια abst. ending.] Any abnormal condition of the refraction of the eye.
1875. H. Walton, Dis. Eye, 617. Such deviation is sometimes called ametropia.
