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
Common cause of sudden blindness in a young diabetic female is: September 2009 & 2010 
Select and explain. 
A. Glaucoma, B. Vitreous defects, C. Papilledema, D. Cataract
B: Vitreous defects
Answer: B: Vitreous defects 
Explanation: Ans. B: Vitreous defects The 3 most common causes of vitreous hemorrhage are: Proliferative diabetic retinopathy Posterior vitreous detachment (PVD) with or without retinal tears Ocular trauma (e.g., shaken baby syndrome); together these account for 60-89% of all cases. Less common causes include branch or central retinal vein occlusion, proliferative sickle cell retinopathy, retinal microaneurysm, age-related macular degeneration, and subarachnoid hemorrhage (Terson syndrome).