night blindness

noun Ophthalmology.
  1. a condition of the eyes in which vision is normal in daylight but abnormally poor at night or in a dim light; nyctalopia.

Origin of night blindness

First recorded in 1745–55
Related formsnight·blind, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for night-blind

night blindness

  1. pathol a nontechnical term for nyctalopia
Derived Formsnightblind, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

night-blind in Medicine


  1. Affected with nyctalopia.

night blindness

  1. nyctalopia
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.