This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cataract Surgery, Subject name: Ophthalmology
Intraocular lens is implanted in a young adult after cataract surgery which was uneventful. When will you remove the IOL? 
Select and explain. 
A. Remove after 10 years, B. Remove after presbyopia, C. After secondary cataract develops, D. Never removed
D: Never removed
Answer: D: Never removed 
Explanation: There is no such indication to remove IOL after 10 years unless any complication like dislocation of IOL occurs. At the time of cataract surgery , the majority of patients are presbyopic. Presbyopia by itself is not an indication to remove IOL. After development of secondary cataract- just treat it by laser / surgical membranectomy( we don't remove IOL for this).