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
The refractive power of an emmetropic eye is about: 
Select and explain. 
A. +50D, B. +55D, C. +60D, D. +65D
C: +60D
Answer: C: +60D 
Explanation: Ans. +60D