[ hem-er-uh-loh-pee-uh ]
/ ˌhɛm ər əˈloʊ pi ə /
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noun Ophthalmology.

a condition of the eyes in which sight is normal in the night or in a dim light but is abnormally poor or wholly absent in the day or in a bright light.



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Also called day blindness.

Origin of hemeralopia

1700–10; <New Latin <Greek hēmeralōp- (stem of hēmerálōps having such a condition (hēmer(a) day +al(aós) blind + -ōps having such an appearance) + -ia-ia; cf. -opia
hem·er·a·lop·ic [hem-er-uh-lop-ik], /ˌhɛm ər əˈlɒp ɪk/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for hemeralopia

/ (ˌhɛmərəˈləʊpɪə) /


inability to see clearly in bright lightNontechnical name: day blindness Compare nyctalopia
hemeralopic (ˌhɛmərəˈlɒpɪk), adjective
C18: New Latin, from Greek hēmeralōps, from hēmera day + alaos blind + ōps eye
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

Medical definitions for hemeralopia

[ hĕm′ər-ə-lōpē-ə ]


A visual defect marked by the inability to see as clearly in bright light as in dim light.day blindness
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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