nyc·ta·lo·pi·a

(nĭk′tə-lō′pē-ə)

[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.

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.

nyctalopia

(ˌnɪktəˈləʊpɪə)

(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]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

night′ blind`ness

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.

nyctalopia

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

ThesaurusAntonymsRelated WordsSynonymsLegend:

Noun

nyctalopia - inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder

moon blindness, night blindness

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

Translations

nyc·ta·lo·pi·a

n. nictalopía, visión imperfecta bajo iluminación baja.

English-Spanish Medical Dictionary © Farlex 2012

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References in periodicals archive

It was claimed Mr Ibbotson, 59, was colour-blind and may also have suffered from night-blindness, known as nyctalopia.

SALA PILOT'S NIGHT-FLY BAN; Aviator 'colour-blind and had poor vision in dark'

It has been reported Mr Ibbotson may also have had colour and night blindness, known as nyctalopia.

Colour-blind Sala pilot 'not qualified for night flying' Claims over licence lost at sea

In accordance with latest survey, at present, the rate of nyctalopia, a disease caused by deficiency of vitamin A, is 0.04 percent in the country as it attained the target of Millennium Development Goals (MDGs) of reducing the rate of nyctalopia below one percent to prevent blindness caused by deficiency of nutrition.

2cr children to fed capsules

The conditions vary, but those with IRDs may face many similar challenges, including night blindness (nyctalopia), declining vision, or blindness at birth.

Your Latest Ophthalmology News for SMi's Ophthalmic Drugs 2018

(3) Most cases present classical symptoms of difficulties with adapting to darkness and night blindness (nyctalopia) in old age and loss of vision in early adolescence.

Simultaneous Presence of Macular Corneal Dystrophy and Retinitis Pigmentosa in Three Members of a Family

She described her mother as having "macular degeneration and retinitis pigmentosa" that began as central vision loss in her forties and progressed to nyctalopia and peripheral vision loss.

Peripheral Cone Dystrophy: Expanded Clinical Spectrum, Multimodal and Ultrawide-Field Imaging, and Genomic Analysis

Patients suffering with RP first experience nyctalopia which gradually progress to tunnel vision and ultimately masks with complete blindness.

A Homozygous c.2536G>A Mutation in CRB1 Gene Manifesting Autosomal Recessive Retinitis Pigmentosa in a Large Consanguineous Kashmiri Family

However, even if the central visual acuity returns to normal, many of these patients still notice dyschromatopsia, loss of contrast sensitivity, metamorphopsia, or, in rare cases, nyctalopia. (20) Although CSR is predominantly seen in men, it can also occur in pregnant women especially in the third trimester.

An eye on pregnancy