This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
Good vision in dim light and clusmy in day lights seen in- 
Select and explain. 
A. Coical cataract, B. Morgagnian cataract, C. Nuclear cataract, D. Steroid induced cataract
A: Coical cataract
Answer: A: Coical cataract 
Explanation: In cupuliform type of senile coical cataract, saucer shaped opacity develops just below the capsule usually in the central pa of posterior coex (posterior sub-capsular) which gradually extends outwards. So vision is better in dim light when pupils are dilated. Ref: AK Khurana 6thE pg189 REF IMG