This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Optics and Errors of Refraction, Subject name: Ophthalmology
Which of the following is not a pa of accomodation 
Select and explain. 
A. Change is anterior curvature of lens, B. Change in posterior curvature of lens, C. Change in Ciliary zonules tension, D. Contraction of ciliary muscles
B: Change in posterior curvature of lens
Answer: B: Change in posterior curvature of lens 
Explanation: No change occurs in posterior curvature of lens in accomodation Accomodation Inherent capacity of eye to focus light rays from near object on retina Due to inc in power of lens because of increase in curvature of lens Inc in curvature of lens of anterior pa of lens Contraction of ciliary muscles causes zonules to relax Lens becomes more convex over anterior surface