Category:Nyctalopia

Nyc`ta*lo"pi*a, n. Etym: [l. nyctalopia, fr. nyctalops a nyctalops, Gr. (med.) (a) a disease of the eye, in consequence of which the patient can see Well in a faint light or at twilight, but is unable to see during the Day or in a strong light; day blindness. (b) see moonblink.

Note: some writers (as quain) use the word in the opposite sense, Night blindness. See hemeralopia.