Which eye part is a muscle controlling the size of the pupil?
A)the fovea
B)the lens
C)the iris
D)the retina

Question

Quizplus · Accepted Answer

The iris is the part of the eye that contains the muscles that control the size of the pupil. When these muscles contract, the pupil gets smaller, and when they relax, the pupil gets larger. The other parts listed (the fovea, lens, and retina) do not have any direct control over the size of the pupil.

Which Eye Part Is a Muscle Controlling the Size of the Pupil