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
Which laser is used in the management of after cataracts - 
Select and explain. 
A. Argon, B. Krypton, C. YAG, D. Excimer
C: YAG
Answer: C: YAG 
Explanation: After cataract, if thin, can be cleared centrally by a YAG laser capsulotomy.