Corneal Surgery Is Now Routinely Performed to Change the Shape

Corneal surgery is now routinely performed to change the shape of the cornea and improve vision. This surgery is beneficial because ________.

A) the cornea is responsible for the circulation of nutrients to the eye
B) the cornea is involved in focusing light onto the retina
C) the cornea controls the amount of light entering the eye
D) the cornea regulates the sensitivity of the photoreceptors

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