Rehabilitation is a treatment or treatments designed to facilitate the process of recovery from injury, illness, or disease to as normal a condition as possible.
Symptoms. An early symptom of vitamin A deficiency is night blindness, which is caused by a disorder of the retina. Soon thereafter, the whites (conjunctiva) and corneas of the eyes may become dry and thickâa condition called xerophthalmia.isorders that impair the intestineâs absorption of fats can reduce the absorption of vitamin A and increase the risk of vitamin A deficiency. These disorders include chronic diarrhea, celiac disease, cystic fibrosis, certain pancreatic disorders, and blockage of the bile ducts.
Definitions of Vitamin A deficiency: Condition due to a deficiency of vitamin A. - (Source-Diseases Database). Vitamin A deficiency is listed as a  rare disease  by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).This means that Vitamin A deficiency, or a subtype of Vitamin A deficiency, affects less than 200,000 people in the US population.efinitions of Vitamin A deficiency: Condition due to a deficiency of vitamin A. - (Source-Diseases Database). Vitamin A deficiency is listed as a  rare disease  by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH).