(Nyctanopia; Nyctalopia; Day Sight; Nocturnal Amblyopia)
|The Retina of the Eye|
|Copyright © Nucleus Medical Media, Inc.|
- Age—Elderly people are more likely to have cataracts.
- Dietary deficiencies—Not getting adequate amounts of vitamin A, which come from green leafy vegetables, eggs, and whole milk products. Vitamin A deficiency is very rare in the US, but still occurs in certain less developed countries.
Disorders that affect the ability of the body to absorb vitamin A:
- Liver disorders
- Surgery on the pancreas or liver
- Intestinal conditions
- Bowel surgery for obesity
- Trouble adjusting from low levels of light to high levels of light
- Taking vitamin A supplements
- Having cataracts removed
- Using low-vision aids
- Follow treatment plans for chronic conditions that may contribute to night blindness
- Eating a diet with adequate amounts of vitamin A
American Optometric Association http://www.aoa.org
Eye Smart—American Academpy of Ophthalmology http://www.eyesmart.org
Canadian Ophthalmological Society http://www.cos-sco.ca
Health Canada http://www.hc-sc.gc.ca
Beers, MH, Fletcher AJ, Jones TV, et al. The Merck Manual of Medical Information. 2nd ed. Whitehouse Station, NJ: Merck Research Laboratories; 2003.
Herse P. Retinitis pigmentosa: Visual function and multidisciplinary management. Clin Exp Iptom. 2005;88:5:335-350.
Night blindness. Retina International website. Available at: http://www.retina-international.org/index.php?menuid=42. Accessed November 10, 2010.
- Reviewer: Michael Woods, MD
- Review Date: 12/2014 -
- Update Date: 12/20/2014 -