Question

What conditions are developed after deficiency of vitamin A?

• A. Night blindness
• B. Keratinization of cornea
• C. Keratinization of conjunctiva
• D. All of the above

Answer 1

The correct option is D All of the above

Keratomalacia is an eye condition, that results from severe deficiency of vitamin A. Early symptoms may include poor vision at night or in dim light (night blindness) and extreme dryness of the eyes (i.e., xerophthalmia), followed by wrinkling, progressive cloudiness, and increasing softening of the corneas (i.e., keratomalacia). With advancing vitamin A deficiency, dry, foamy, silver-gray deposits (Bitot spots) may appear on the delicate membranes covering the whites of the eyes. Without adequate treatment, increasing softening of the corneas may lead to corneal infection, rupture (perforation), and degenerative tissue changes, resulting in blindness.