As you walk into a brightly lit room, the black structure in the center of your eye seems to shrink to a tiny black dot. This response is caused by the action of the eye structure called the:
A)cornea.
B)lens.
C)iris.
D)retina.

Question

Quizplus · Accepted Answer

The iris is the colored part of the eye that controls the size of the pupil. In response to bright light, the iris will contract and reduce the size of the pupil, causing the black structure in the center of the eye (the pupil) to shrink to a tiny black dot.

As You Walk into a Brightly Lit Room, the Black