(Nyctanopia; Nyctalopia; Day Sight; Nocturnal Amblyopia)
|The Retina of the Eye|
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- Common vision disorders, such as difficulty seeing or focusing on distant objects (nearsightedness)
- Cataracts, which are cloudy areas in the lens of the eye
- Some forms of retinal degeneration, such as retinitis pigmentosa
- Posterior uveitis
- Certain medications, such as those used to treat glaucoma
- Vitamin A deficiency
- Birth defects affecting the retina
- Trouble adjusting from low levels of light to high levels of light
- History of eye disorders, such as cataracts or glaucoma
- Diabetes (contributes to eye disorders)
- Family history of eye disorders
- Genetic mutations that contribute to eye disorders
- Not getting adequate amounts of vitamin A, which come from green leafy vegetables, eggs, and whole milk products. Vitamin A deficiency is rare in the United States, but still occurs in certain less developed countries.
Disorders that affect the ability of the body to absorb vitamin A:
- Liver or pancreatic disorders
- Intestinal conditions
- Gastric bypass surgery for obesity
- Taking vitamin A supplements
- Having cataracts removed
- Taking medications to treat eye conditions
- Using low-vision aids and making lifestyle adjustments
- Follow treatment plans for chronic conditions that may contribute to night blindness
- Have regular eye exams as advised by your eye doctor
- 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
Cataract. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated November 4, 2015. Accessed December 9, 2015.
Glaucoma and driving. Glaucoma Research Foundation website. Available at: http://www.glaucoma.org/treatment/glaucoma-and-driving.php. Updated April 1, 2013. Accessed December 9, 2015.
Night blindness. Cleveland Clinic website. Available at: http://my.clevelandclinic.org/services/cole-eye/diseases-conditions/hic-night-blindness. Updated March 18, 2015. Accessed December 9, 2015.
Open-angle glaucoma. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated November 19, 2015. Accessed December 9, 2015.
Retinitis pigmentosa. EBSCO DynaMed website. Available at: http://www.ebscohost.com/dynamed. Updated September 30, 2014. Accessed December 9, 2015.
Vitamin A. Office of Dietary Supplements website. Available at: https://ods.od.nih.gov/factsheets/VitaminA-HealthProfessional. Updated June 5, 2013. Accessed December 9, 2015.
What is low vision? American Academy of Ophthalmology Eye Smart website. Available at: http://www.geteyesmart.org/eyesmart/diseases/low-vision.cfm. Accessed December 9, 2015.
- Reviewer: Michael Woods, MD
- Review Date: 12/2015 -
- Update Date: 12/09/2015 -