hemeralopia noun. [hɛmǝrǝ'lǝʊpɪǝ] E18.
[mod. Latin, from Greek hēmeralōps, from hēmera day + alaos blind + ōps eye: see -IA¹. Cf. NYCTALOPIA.]
1. Chiefly Medicine. A defect of vision (usu. congenital) in which there is poor vision in good light but comparatively good vision in poor light. Also called day blindness. E18.

2. [By confusion.] = NYCTALOPIA 1. Now rare. E19.

■ hemeralopic adjective affected with hemeralopia L19.

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