
1) Avitaminosis 2) Hemeralopia 3) Hypovitaminosis 4) Moon blindness 5) Night blindness 6) Vision defect 7) Visual defect 8) Visual disorder 9) Visual impairment
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https://www.crosswordclues.com/clue/nyctalopia

1) Night blindness
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https://www.crosswordclues.com/clue/nyctalopia

Nyctalopia (from Greek νύκτ-, nykt- `night`; αλαός, alaos `blind, not seeing`, and ὄψ, ops `eye`), also called night blindness, is a condition making it difficult or impossible to see in relatively low light. It is a symptom of several eye diseases. Night blindness may exist from birth, or be caused by injury or malnutrition (for...
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http://en.wikipedia.org/wiki/Nyctalopia

night-blindness
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http://phrontistery.info/n.html

• (n.) See Moonblink. • (n.) A disease of the eye, in consequence of which the patient can see well in a faint light or at twilight, but is unable to see during the day or in a strong light; day blindness. • (n.) See Moonblink. • (n.) A disease of the eye, in consequence of which the patient can see well in a faint light or at t...
Found on
http://thinkexist.com/dictionary/meaning/nyctalopia/

Night blindness or difficulty in seeing at night. Symptom of vitamin A deficiency. ... (27 Sep 1997) ...
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http://www.encyclo.co.uk/local/20973

(nik″tә-lo´pe-ә) night blindness. sometimes incorrectly used as a synonym for hemeralopia.
Found on
http://www.encyclo.co.uk/local/21001
Nyc`ta·lo'pi·a noun [ Latin
nyctalopia , from
nyctalops a nyctalops, Greek .... Greek ... meant, a person affected either with day blindness or with night blindness, and in the former case was derived from ..., ..., night + ..., ..., the eye; in the latter, from ... + ... blind + .....
Found on
http://www.encyclo.co.uk/webster/N/42

Type: Term Pronunciation: nik-tă-lō′pē-ă Definitions: 1. Decreased ability to see in reduced illumination. Seen in patients with impaired rod function; often associated with a deficiency of vitamin A. Synonyms: day sight, night blindness, nocturnal amblyopia, nyctanopia
Found on
http://www.medilexicon.com/medicaldictionary.php?t=61923

Nyctalopia: Night blindness, impaired vision in dim light and in the dark, due to impaired function of certain specialized vision cells (the rods) in the retina. The ability of our eyes to quickly view objects as they shift from light to dark areas and the ability to see in dim light or at night is an important part of our visual health. When we ar...
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http://www.medterms.com/script/main/art.asp?articlekey=6448

[
n] - inability to see clearly in dim light
Found on
http://www.webdictionary.co.uk/definition.php?query=nyctalopia

nyctalopia 1. Night blindness; failure or imperfection of vision at night or in a dim light. Smoking tobacco may impair the ability to see at night. Hypoxia associated with being above sea level in an aircraft will also decrease night vision. 2. The inability to see well under scotopic (dark) conditions, due to faulty rod function. The `rod” use...
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http://www.wordinfo.info/words/index/info/view_unit/2563/
night blindness noun inability to see clearly in dim light; due to a deficiency of vitamin A or to a retinal disorder
Found on
https://www.encyclo.co.uk/local/20974

hemeralopia.
Found on
https://www.infoplease.com/dictionary/nyctalopia
No exact match found.