This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cornea, Subject name: Ophthalmology
Power of cornea is- 
Select and explain. 
A. 30 D, B. 44 D, C. 55 D, D. 60 D
B: 44 D
Answer: B: 44 D 
Explanation: Ans. is 'b' i.e., 44 D "Out of + 60 D (total diopter power of eye), + 44 D is provided by the cornea."