nyctalopia, so frequently encountered, must be regarded as a circulatory symptom rather than as one of nervous origin.
His nyctalopia was a great advantage, his cat-like sight enabling him to distinguish the smallest object in the deepest gloom.
Government, offer to it, to discover the remedy for nyctalopia, 335.
nyctalopia nyc·ta·lo·pi·a (nĭk'tə-lō'pē-ə)
A condition of the eyes in which vision is normal in daylight or other strong light but is abnormally weak or completely lost at night or in dim light and that results from vitamin A deficiency, disease, or hereditary factors. Also called night blindness.