A nutritional condition produced by a deficiency of VITAMIN A in the diet, characterized by NIGHT BLINDNESS and other ocular manifestations such as dryness of the conjunctiva and later of the cornea (XEROPHTHALMIA). Vitamin A deficiency is a very common problem worldwide, particularly in developing countries as a consequence of famine or shortages of vitamin A-rich foods. In the United States it is found among the urban poor, the elderly, alcoholics, and patients with malabsorption. (From Cecil Textbook of Medicine, 19th ed, p1179)
    

concept

Eye conditions and treatments: preventing blindness in Kenya through primary health care. Colour lithograph by Ministry of Health, ca. 2000.

Mead's cod liver oil, fortified with percomorph liver oil... : Mead's oleum percomorphum, 50%... / Brooks & Warburton, Ltd.

Vitamin A Deficiency

Images

Catalogue

Mellanby films. Compilation 7, Animal behaviour.

Experimental studies on the course of paratyphoid infections in avitaminotic rats : with special reference to vitamin A deficiency / by H.C.A. Lassen.

Mellanby films. Compilation 8, The effect of feeding oats subjected to chemical and biological treatment.

Lesions of the central and peripheral nervous systems produced in young rabbits by vitamin A deficiency and a high cereal intake / by Edward Mellanby.

The food value of mangolds and the effects of deficiency of vitamin A on guinea-pigs / by Ellen Boock and John Trevan.