night sight


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sight

 [sīt]
a thing seen.
far sight hyperopia.
near sight myopia.
night sight hemeralopia.

hem·er·a·lo·pi·a

(hem'ĕr-ăl-ō'pē-ă),
Inability to see as distinctly in a bright light as in reduced illumination; seen in patients with impaired cone function.
Synonym(s): day blindness, hemeranopia, night sight
[G. hēmera, day, + alaos, obscure, + ōps, eye]

night sight

hemeralopia

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.
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References in periodicals archive ?
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Using thermal imaging common modules provided by Thorn EMI, of the UK, Bofors Aerotronics is also producing the night sight for the RBS56 Bill infantry anti-tank missile.
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