This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Glaucoma, Subject name: Ophthalmology
An elderly male who has a history of glaucoma, on examination shows bulging of cornea. What is the diagnosis? 
Select and explain. 
A. Keratoconus, B. Staphyloma, C. Glaucomatous iridocyclitis, D. Keratomalacia
B: Staphyloma
Answer: B: Staphyloma 
Explanation: ANS. BStaphyloma is an abnormal protrusion of the uveal tissue through a weak point in the eyeball.There are 5 types of staphyloma.1. Anterior staphyloma2. Intercalary3. Ciliary4. Equatorial5. Posterior.