This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Optics and refraction, Subject name: Ophthalmology
[{'content': 'Treatment of presbyopia - \nSelect and explain. \nA. LASIK, B. Concave lens, C. Convex lens, D. Radial keratotomy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Treatment Optical treatment. The treatment of presbyopia is the prescription of appropriate convex glasses for near work.The weakest convex lens with which an individual can see clearly at the near point should be prescribed, since overcorrection will also result in asthenopic symptoms. Reference : A K KHURANA OPHTALMOLOGY,Edition 4,Page-42', 'role': 'assistant'}]