Corneal Surgery Is Now Routinely Performed to Improve Vision

Corneal surgery is now routinely performed to improve vision.This surgery _____.

A) improves the circulation of nutrients to the eye
B) improves the focusing of light onto the retina
C) increases the amount of light entering the eye
D) increases the sensitivity of the photoreceptors
E) both improves the focusing of light onto the retina and increases the amount of light entering the eye