nyctalopia

nyc·ta·lo·pi·a

N0200700 (nĭk′tə-lō′pē-ə)n. See night blindness.

[Late Latin nyctalōpia, from Greek nuktalōps, night-blind : nux, nukt-, night; see nek^w-t- in Indo-European roots + alaos, blind + ōps, ōp-, eye; see ok^w- in Indo-European roots.]

nyc′ta·lo′pic (-lō′pĭk, -lŏp′ĭk) adj.

nyctalopia

(ˌnɪktəˈləʊpɪə) n (Pathology) inability to see normally in dim light. Nontechnical name: night blindness Compare hemeralopia[C17: via Late Latin from Greek nuktálōps, from nux night + alaos blind + ōps eye]

night′ blind`ness

n. a condition in which vision is normal in daylight but abnormally poor in dim light. [1745–55] night′blind`, adj.

nyctalopia

a condition of the eyes in which the sufferer can see clearly during the day or in bright light but has impaired vision at night or in poor light; night blindness.See also: Eyes

night-blindness.See also: Night

the loss of sight in darkness. — nyctalopic, adj.See also: Blindness

nyctalopia

(night blindness) The inability to see well in dim light.

Thesaurus

Noun

nyctalopia - inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disordermoon blindness, night blindnessavitaminosis, hypovitaminosis - any of several diseases caused by deficiency of one or more vitaminsvision defect, visual defect, visual disorder, visual impairment - impairment of the sense of sight

Translations

Nyctalopia

enUK

nyctalopia

[‚nik·tə′lō·pē·ə] (medicine) night blindness

Nyctalopia

night blindness, a visual disorder manifested by partial or total inability to see objects in the twilight or at night.

Nyctalopia may arise in connection with certain organic diseases of the retina, choroid coat, or optic nerve, or with glaucoma (symptomatic nyctalopia); in connection with poor general nutrition due to starvation, certain liver diseases, malaria, alcoholism, or other conditions accompanied by a deficiency or total absence of vitamin A (functional nyctalopia); or in connection with congenital pigment degeneration of the retina (congenital nyctalopia). The immediate cause of nyctalopia is connected with structural changes in the retinal rods or a deficiency of rhodopsin (visual purple), which disintegrates in the light but is restored in the dark in the presence of vitamin A. Nyctalopia patients suffer from photophobia in bright light and sharply reduced vision in the twilight and at night. They may also suffer from reduced color sensitivity with respect to blue and yellow. Sometimes their visual field is narrowed and its acuity diminished. Nyctalopia is usually exacerbated in early spring because of insufficient vitamin A in the food.

A fully balanced diet, cod liver oil, and intake of vitamins A, B₁, B₂, and C are important to both treatment and prevention. In cases of symptomatic nyctalopia the causative disease should be treated.

REFERENCE

Katsnel’son, A. B. Vitaminy i avitaminozy v oftal’mologii.[Cheliabinsk] 1947.

S. I. TAL’KOVSKII

nyctalopia

[nik″tah-lo´pe-ah] 1. night blindness.2. sometimes incorrectly used as a synonym for hemeralopia" >hemeralopia.

nyc·ta·lo·pi·a

(nik-tă-lō'pē-ă), Decreased ability to see in reduced illumination. Seen in patients with impaired rod function; often associated with a deficiency of vitamin A. Synonym(s): day sight, night blindness, nocturnal amblyopia, nyctanopia [nyct- + G. alaos, obscure, + ōps, eye]

nyctalopia

(nĭk′tə-lō′pē-ə)n. See night blindness.

nyc′ta·lo′pic (-lō′pĭk, -lŏp′ĭk) adj.

nyc·ta·lo·pi·a

(nik'tă-lō'pē-ă) Decreased ability to see in reduced illumination. Seen in patients with impaired rod function; often associated with a deficiency of vitamin A.
Synonym(s): night blindness. [nyct- + G. alaos, obscure, + ōps, eye]

nyctalopia

Inability to see well in conditions of poor illumination. NIGHT BLINDNESS. From the Greek nyktos, night, alaos, blind and ops, the eye.

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.

nyctalopia

nyc·ta·lo·pi·a

nyctalopia

night′ blind`ness

nyctalopia

nyctalopia

Nyctalopia

nyctalopia

Nyctalopia

REFERENCE

nyctalopia

nyctalopia

nyc·ta·lo·pi·a

nyctalopia

nyc·ta·lo·pi·a

nyctalopia

hemeralopia

nyctalopia

Synonyms for nyctalopia

noun inability to see clearly in dim light

Synonyms

Related Words