night sight

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a thing seen.
far sight hyperopia.
near sight myopia.
night sight hemeralopia.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


Inability to see as distinctly in a bright light as in reduced illumination; seen in patients with impaired cone function.
[G. hēmera, day, + alaos, obscure, + ōps, eye]
Farlex Partner Medical Dictionary © Farlex 2012


Term used to mean either night blindness in which there is a partial or total inability to see in the dark associated with a loss of rod function or vitamin A deficiency; or day blindness in which there is reduced vision in daylight while vision is normal in the dark. Syn. nyctalopia (this term is only synonymous with night blindness); night sight (this term is only synonymous with day blindness). See girate atrophy; congenital stationary night blindness; choroideremia; Oguchi's disease; retinitis pigmentosa.
Millodot: Dictionary of Optometry and Visual Science, 7th edition. © 2009 Butterworth-Heinemann
References in periodicals archive ?
Even though the night sights no longer glowed I found the white dots made it easier for me to align the rear sight with the front sight.
"It is hyperbole, but true," says Marc Levoy, a retired Stanford computer science professor who once taught Google's founders Larry Page and Sergey Brin and now works for them on camera projects including Night Sight.
When in Night Sight mode, the Google Camera app is able to measure the user's natural hand shake and the motion on the scene even before a user presses the shutter button.
After changing a large number of sights--and if you work in a retail gun shop, night sights are a steady item--you will note this as well.
Night Sight: aiming to win the Hambleton Cup for second successive year
Night Sight, bought out of the Geoff Wragg stable as a two-year-old in cracking form and Chapman explained: "We ran him over hurdles and it frightened him, for a while we did not travel him far so that he would not have too much time to worry about going to the races.
They say that LG makes fairly good cameras and the Night Sight feature included in this port makes the cameras on these supported phones "even better".
Among the most touchy jobs is adjusting night sights. However, by using a wooden punch you should be able to adjust such sights without causing the ampules to pop out.
Optical Systems Technology is furnishing the US Marine Corps with the Magnum Universal Night Sight under the terms of a 2006 contract worth $ 6.9 million.
Kieren Fallon is reunited with Night Sight on whom he finished second at Pontefract in May.