(redirected from Night sight)
Also found in: Thesaurus, Medical, Legal, Encyclopedia.


A visual defect characterized by the inability to see as clearly in bright light as in dim light.

[New Latin hēmeralōpia, from Greek hēmeralōps, suffering from hemeralopia : hēmera, day + alaos, blind + ōps, eye; see nyctalopia.]

hem′er·a·lop′ic (-lŏp′ĭk) adj.
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.


(Pathology) inability to see clearly in bright light. Nontechnical name: day blindness Compare nyctalopia
[C18: New Latin, from Greek hēmeralōps, from hēmera day + alaos blind + ōps eye]
hemeralopic adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌhɛm ər əˈloʊ pi ə)

a condition in which vision is normal in the night or in dim light but is abnormally poor or wholly absent in the day or in bright light.
[1700–10; < Greek hēmeralōp-, s. of hēmerálōps suffering from day blindness (hēmér(a) day + ala(ós) blind + -ōps having eyes of the kind specified; see Cyclops) + -ia; compare -opia]
hem`er•a•lop′ic (-ˈlɒp ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.


a condition of the eyes in which the sufferer can see clearly at night but has impaired vision during the day; day blindness.
See also: Eyes
the loss of sight in daylight. — hemeralopic, adj.
See also: Blindness
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.hemeralopia - inability to see clearly in bright light
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 ?
With Pixel 3, Google introduced a mode called Night Sight that quickly set the bar in low-light photography.
Caption: The AT47 also has a flip-up front night sight, though the insert no longer glows.
Yes, you can now bag a phone capable of using Google's incredible Night Sight photo mode for less than PS400.
At night for the past few weeks, I've been tromping around dark places taking photos using a new mode on Google's $800 Pixel 3 called Night Sight. Friends in a candlelit bar look like they brought a lighting crew.
Google has begun rolling out its new Night Sight camera mode to&nbsp;all Pixel phones, including the Pixel 3 and Pixel 3 XL.
When choosing a night sight as an example, the user may find that some, such as the Trijicon, require more effort to fit to the rear dovetail than others.
The night sight by Beretta, widely used in the US, was fitted with a small screw, which needed to be opened before use.
Ignoring battery musts can leave you and your AN/PVS-30 sniper night sight blind and in the dark.
Other features include a bow/rifle harness system, scope/tripod pockets, adjustable padded belt, seven Tech-Lok Pockets, and yoke-style padded shoulder straps with lens cloth and retractable Night Sight LED light.
The launcher is equipped with a side opening that can accept longer projectiles, an advanced day and night sight and a double-action trigger.
Qureshi was arrested as he prepared to board the plane with nearly pounds 9,000, a night sight, and military information stored on computer discs.