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nyctalopia    
n. 夜盲症

夜盲症

nyctalopia
n 1: inability to see clearly in dim light; due to a deficiency
of vitamin A or to a retinal disorder [synonym: {nyctalopia},
{night blindness}, {moon blindness}]

Nyctalopia \Nyc`ta*lo"pi*a\ (n[i^]k`t[.a]*l[=o]"p[i^]*[.a]), n.
[L. nyctalopia, fr. nyctalops a nyctalops, Gr. nykta`lwps.
Gr. nykta`lwps meant, a person affected either with day
blindness or with night blindness, and in the former case was
derived fr. ny`x, nykto`s, night 'w`ps, 'wpo`s, the eye; in
the latter, fr. ny`x 'alao`s blind 'w`ps.] (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}.
[1913 Webster]

Note: Some writers (as Quain) use the word in the opposite
sense, night blindness. See {Hemeralopia}.
[1913 Webster]


Moonblink \Moon"blink`\, n.
A temporary blindness, or impairment of sight, said to be
caused by sleeping in the moonlight; -- sometimes called
{nyctalopia}.
[1913 Webster]


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