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
[{'content': 'An elderly male who has a history of glaucoma, on examination shows bulging of cornea. What is the diagnosis? \nSelect and explain. \nA. Keratoconus, B. Staphyloma, C. Glaucomatous iridocyclitis, D. Keratomalacia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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.', 'role': 'assistant'}]