The muscle that controls the amount of light that enters the eye through the pupil is the
A)choroids.
B)suspensory ligament.
C)ciliary muscle.
D)iris.

Question

Quizplus · Accepted Answer

The iris is the muscle that controls the size of the pupil, which in turn controls the amount of light that enters the eye. The ciliary muscle helps to change the shape of the lens for focusing, but does not directly affect the pupil size. The choroids provide blood supply to the retina, and the suspensory ligament holds the lens in place.

The Muscle That Controls the Amount of Light That Enters