This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
[{'content': 'Power of a reduced eye is normally: \nSelect and explain. \nA. 20-D, B. 35-D, C. 18-D, D. 58-D', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. 58 Dioptres The total diopteric power of eye is about + 58.6D (-60 D) Q, out of which + 44 D is contributed by cornea and +16 D by the lens Q', 'role': 'assistant'}]