This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Special Senses: Vision and its Elements, Subject name: Physiology
The optical power of the eye is 
Select and explain. 
A. 25 Dioptres, B. 50 Dioptres, C. 60 Dioptres, D. 75 Dioptres
C: 60 Dioptres
Answer: C: 60 Dioptres 
Explanation: (C) 60 Dioptres > The human eye has a refractive power of approximately 60 diopters at rest.