Also found in: Thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia.
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. The condition may result from vitamin A deficiency, disease, or hereditary factors. Also called nyctalopia.
(Pathology) pathol a nontechnical term for nyctalopia
a condition in which vision is normal in daylight but abnormally poor in dim light.
Switch to new thesaurus
|Noun||1.||night blindness - inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder|
avitaminosis, hypovitaminosis - any of several diseases caused by deficiency of one or more vitamins