"night blindness." YourDictionary, n.d. Web. 20 October 2018. <http://www.yourdictionary.com/night-blindness>.
night blindness. (n.d.). Retrieved October 20th, 2018, from http://www.yourdictionary.com/night-blindness
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 .