from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Extreme dryness and thickening of the conjunctiva, often resulting from a deficiency of vitamin A.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A condition due to a deficiency of vitamin A where the conjunctiva and cornea become dry. The condition starts with conjunctival xerosis and night blindness and progresses to corneal xerosis and, later, a severe condition called keratomalacia.
from the GNU version of the Collaborative International Dictionary of English
- n. An abnormal dryness of the eyeball produced usually by long-continued inflammation and subsequent atrophy of the conjunctiva.
from The Century Dictionary and Cyclopedia
- n. A dry form of conjunctivitis, resulting in a thickening and skin-like condition of the conjunctiva. Also xeroma, and xerosis of the conjunctiva.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. abnormal dryness of the conjunctiva and cornea of the eyes; may be due to a systemic deficiency of vitamin A
Vitamin A deficiency in humans, as well as rats, was later shown to produce serious eye damage (xerophthalmia) and it remains a major cause of blindness in the Third World.
Dry eyes (xerophthalmia, or nutritional blindness) is the most common cause of child blindness.
Lack of Vitamin A: Vitamin A deficiency can lead to dry-eye disease (xerophthalmia), night-blindness and eventually complete blindness.
Measles increases the con-sumption of vitamin A and often precipitates xerophthalmia.
The cornea becomes dull and pitted as in xerophthalmia.
· In communities where xerophthalmia is common, give 200,000 units of vitamin A once every 6 months to women who are breast feeding, and also to pregnant women during the second half of their pregnancy.
- Give prophylaxis against xerophthalmia: vitamin A
Whole milk, eggs, and liver are also rich in vitamin A. · If the child is not likely to get these foods, or if he is developing signs of night blindness or xerophthalmia, give him vitamin A, 200,000 units (60 mg. retinol, in capsule or liquid) once every 6 months.
Vitamin A (retinol) - for night blindness and xerophthalmia
Children with measles are at especially high risk of xerophthalmia, and should be given vitamin A when the illness begins.