Important
Important
It is possible that the main title of the report Keratomalacia is not the name you expected. Please check the synonyms listing to find the alternate name(s) and disorder subdivision(s) covered by this report.
Synonyms
- None
Disorder Subdivisions
- None
General Discussion
Keratomalacia is an eye (ocular) condition, usually affecting both eyes (bilateral), that results from severe deficiency of vitamin A. That deficiency may be dietary (i.e., intake) or metabolic (i.e., absorption). Vitamin A is essential for normal vision as well as proper bone growth, healthy skin, and protection of the mucous membranes of the digestive, respiratory, and urinary tracts against infection.
Early symptoms may include poor vision at night or in dim light (night blindness) and extreme dryness of the eyes (i.e., xerophthalmia), followed by wrinkling, progressive cloudiness, and increasing softening of the corneas (i.e., keratomalacia). With advancing vitamin A deficiency, dry, "foamy," silver-gray deposits (Bitot spots) may appear on the delicate membranes covering the whites of the eyes. Without adequate treatment, increasing softening of the corneas may lead to corneal infection, rupture (perforation), and degenerative tissue changes, resulting in blindness. In addition, in some cases, vitamin A deficiency may have additional effects, particularly during infancy and childhood.
In some developing countries, vitamin A deficiency in the diet and associated keratomalacia are a major cause of childhood blindness. In such regions, vitamin A deficiency often occurs as part of nonselective general malnutrition in infants and young children. Although rare in developed countries, vitamin A deficiency and keratomalacia may occur secondary to conditions associated with impaired absorption, storage, or transport of vitamin A, such as celiac disease, ulcerative colitis, cystic fibrosis, liver disease, or intestinal bypass surgery and any condition that affects absorption of fat-soluble vitamins.
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Resources
National Association for Visually Handicapped
22 West 21st Street
New York, NY 10010
USA
Tel: 2128893141
Fax: 2127272931
Email: staff@navh.org
Internet: http://www.navh.org
National Eye Research Foundation
910 Skokie Boulevard
Suite 207A
Northbrook, IL 60062
Tel: (847)564-4652
Fax: (847)564-0807
Tel: (800)621-2258
Email: nerf1955@aol.com
Internet: http://www.nerf.org
Prevent Blindness America
211 West Wacker Drive
Suite 1700
Chicago, IL 60606
Tel: (312)363-6001
Fax: (312)363-6052
Tel: (800)331-2020
Email: info@preventblindness.org
Internet: http://www.preventblindness.org
NIH/National Digestive Diseases Information Clearinghouse
2 Information Way
Bethesda, MD 20892-3570
Tel: (301)654-3810
Fax: (301)907-8906
Tel: (800)891-5389
Email: nddic@info.niddk.nih.gov
Internet: http://www.niddk.nih.gov
NIH/National Eye Institute
Building 31 Rm 6A32
31 Center Dr MSC 2510
Bethesda, MD 20892-2510
United States
Tel: 3014965248
Fax: 3014021065
Email: 2020@nei.nih.gov
Internet: http://www.nei.nih.gov/
World Health Organization (WHO) Regional Office for the Americas (AMRO)
Pan American Health Organization (PAHO)
525 23rd Street NW
Washington, DC 20037
Tel: (202)974-3000
Fax: (202)974-3663
Email: postmaster@paho.org
Internet: http://www.who.ch/
Blind Children's Center
4120 Marathon Street
Los Angeles, CA 90029-3584
USA
Tel: 3236642153
Fax: 3236653828
Tel: 8002223566
Email: info@blindcntr.org
Internet: http://www.blindcntr.org
