night blindness


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night blindness

n.
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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

night blindness

n
(Pathology) pathol a nontechnical term for nyctalopia
ˈnightˌblind adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

night′ blind`ness


n.
a condition in which vision is normal in daylight but abnormally poor in dim light.
[1745–55]
night′blind`, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.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
vision defect, visual defect, visual disorder, visual impairment - impairment of the sense of sight
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Night blindness, "which indicates that there was a statistically significant difference between the groups.
He said newborns suffered from squint or strabismus and night blindness.
Macular degeneration, cataracts, night blindness and glaucoma have all been shown to decrease by regularly eating bananas.
Risk of macular degeneration, cataracts, night blindness and glaucoma have all been shown to decrease by regularly eating bananas.
Vitamin A: This vitamin is necessary for visual health, and deficiency (rare in the United States) leads to night blindness and even complete blindness.
Among the topics are inheritance patterns, ethical issues, primary congenital glaucoma and juvenile open angle glaucoma, Margan syndrome and other causes of ectopic lentis, familial exudative vitreoretinopathy, retinitis pigmentosa, cone-rod dystrophy, enhanced S-cone syndrome and other NR2ES-related retinal dystrophies, congenital stationary night blindness, optic nerve hypoplasia, and Leber hereditary optic neuropathy.
He explained further that the NGO decided to celebrate them and make them happy by offering free medical tests and drugs to boost their health and the exercise covered the screening and treatment for diabetes, cataract, hernia, night blindness, short and long sightedness, arthritis, dislocations, hypertension and high sugar level among such treatable ailments.
Rehmat has night blindness and this is the first time he has been diagnosed with the disease.
Autosomal dominant RP (adRP) is the most common form of RP and typically begins with night blindness in the early teens, followed by progressive loss in the peripheral visual field, subsequent loss of vision, and eventually legal blindness.