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 ocular emergencies except: 
Select and explain. 
A. Angle closure glaucoma, B. Central serous retinopathy, C. Retinal detachment, D. Central retinal aerial occlusion
B: Central serous retinopathy
Answer: B: Central serous retinopathy 
Explanation: B i.e. Central serous retinopathy Ocular emergency are the diseases that causes sudden loss of vision. CRAO, RD & acute angle closure glaucoma all leads to sudden loss of vision. Central serous retinopathy (CSR) is a self-limiting disease of young or middle age males with type A personality.