Nutritional deficiencies play a significant role in corneal and conjunctival disease. The most common nutritional deficiency affecting the eye is vitamin A deficiency (VAD). Vitamin A is essential for vision, immunity, the maintenance of surface linings of eyes, epithelial cell growth and repair, etc. The majority of vitamin A stored in the liver is bound to retinol-binding protein. Primary VAD is a result of decreased ingestion of retinoids and secondary VAD is result from faulty metabolism or absorption. The VAD can causes night blindness, conjunctival xerosis, Bitotʼs spots, corneal xerosis, keratomalacia and corneal scar. These diseases can be managed by daily supplementation of vitamin A. The other nutrient deficiencies affecting eye are vitamin B deficiency (riboflavin), vitamin C deficiency, magnesium deficiency, zinc deficiency, carbohydrates and protein deficiency.