Which of the following eye structures is responsible for controlling the amount of light that enters the eyeball?
a. cornea
b. pupil
c. retina
d. lens
b
Explanation:
a. cornea: is the anterior part of the sclera
b. pupil: correct
c. retina: is the inner layer of the eyeball
d. lens: is the transparent structure lying behind the iris and the pupil
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