Ophthalmology General 038f2552 Keratoconus is defined as: March 2013 (h) A Degeneration of conjunctiva B Cornea undergoes necrosis due to vitamin A deficiency C Cornea thins near the centre & bulges forwards D Recurrent corneal ulcerations of cornea High-Yield Explanation Ans. C i.e. Cornea thins near the centre & bulges forwards