The National Prophylaxis Programme for Prevention of Blindness was launched in India in 1970 to address widespread cases of nutritional blindness caused by Vitamin A deficiency, especially among children.
Vitamin A is essential for maintaining healthy eyesight and a deficiency can lead to night blindness, dryness of the eyes (xerophthalmia), and in severe cases, complete blindness. The programme involves periodic administration of high doses of Vitamin A supplements to children under 5 years of age.
Why other options are incorrect:
(B) Iron: Iron deficiency leads to anaemia, not blindness.
(C) Iodine: Iodine deficiency causes goitre and mental impairment.
(D) Protein: Protein deficiency leads to conditions like kwashiorkor and marasmus.