Pho·tŏp’si-ă, n.

n. [Fr. photopsie, fr. Gr. φῶς, φωτός, light, and ὄψις, sight, from ὄψομαι (root ὀπτεῖν), fut. of ὁρᾶν, to see.] (Med.) An affection of the eye, in which the patient perceives luminous rays, ignited lines, coruscations, and the like.