What is the hardening of the cornea of the eye called?

Correct option is C

Ans. (c) Xerophthalmia
Sol. Xerophthalmia is a condition caused by Vitamin A deficiency, leading to dryness and hardening of the cornea. If untreated, it can progress to corneal ulceration and blindness. It is commonly seen in malnourished individuals and children in developing countries.
Explanation of each option:
· (a) Night Blindness – Caused by Vitamin A deficiency, but it affects low-light vision rather than corneal hardening.
· (b) Osteomalacia – A bone-softening disease due to Vitamin D deficiency, unrelated to the eye.
· (c) Xerophthalmia – Correct answer. It involves corneal dryness and hardening, leading to vision impairment.
· (d) Rickets – A childhood disease caused by Vitamin D deficiency, leading to soft and weak bones.