This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
All are the causes of a non-healing corneal ulcer except: 
Select and explain. 
A. Raised intraocular pressure, B. Associated iridocyclitis, C. Chronic dacryocystitis, D. Diabetes mellitus
B: Associated iridocyclitis
Answer: B: Associated iridocyclitis 
Explanation: Ans. Associated iridocyclitis