This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Errors of Refraction, Subject name: Ophthalmology
Refraction in eye not affected by: 
Select and explain. 
A. Removal of vitreous, B. Lens thickened, C. Anterior chamber depth increased, D. Axial length changed
C: Anterior chamber depth increased
Answer: C: Anterior chamber depth increased 
Explanation: Ans. c. Anterior chamber depth increasedREFRACTORY POWER DEPENDS ONRadii of curvatureDifference in refractive index between two media at interface of refraction. (Anterior surface of cornea has maximum refractive power due to maximum change (0.376) in refractive index from air to cornea.Axial length of eyeball