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
Which presbyopic lens is used for 45 year old emmetropic individual? 
Select and explain. 
A. +0.5D, B. +1.0D, C. +1.5D, D. +2.0D
B: +1.0D
Answer: B: +1.0D 
Explanation: Rough estimate for presbyopic add
45 yrs : +1.00 to +1.35 D
50 yrs : +1.50 to +1.75 D
55 yrs : +2.00 to +2.25 D