This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy, Development and clinical examination, Subject name: Ophthalmology
YAG laser is used in 
Select and explain. 
A. Retinal detachment, B. diabetes, C. Refractive errors, D. After cataract
D: After cataract
Answer: D: After cataract 
Explanation: Posterior capsular opacity/after cataract treated by ND-YAG capsulotomy A Yag capsulotomy is a special laser treatment used to improve your vision after cataract surgery. It is a simple, commonly performed procedure which is very safe. During your cataract operation, the natural lens inside your eye that had become cloudy was removed. Yag laser capsulotomy is the only way to treat this. Reference: khurana 6th edition pg 233