This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea and sclera, Subject name: Ophthalmology
Ciliary staphyloma occurs due to all of the following except 
Select and explain. 
A. Scleritis, B. Episcleritis, C. Perforating injury, D. Absolute glaucoma
B: Episcleritis
Answer: B: Episcleritis 
Explanation: STAPHYLOMAS Staphyloma refers to a localised bulging of weak and thin outer tunic of the eyeball (cornea or sclera), lined by uveal tissue which shines through the thinned out fibrous coat. Ciliary staphyloma: As the name implies, it is the bulge of weak sclera lined by ciliary body. It occurs about 2-3 mm away from the limbus. Its common causes are thinning of sclera following perforating injury, scleritis and absolute glaucoma. Ref:- A K KHURANA; pg num:-131,132