‖ ametropiaPath.|æmɪˈtrəʊpɪə| [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. 1875Walton Dis. Eye 617 Such deviation is sometimes called ametropia.