The colored portion of the eye that contracts or expands depending on the amount of light striking it is the
A)pupil.
B)lens.
C)iris.
D)cornea.

Question

Quizplus · Accepted Answer

The iris is the colored portion of the eye that surrounds the pupil and is responsible for controlling the size of the pupil. This allows the iris to regulate the amount of light that enters the eye. The lens is responsible for focusing light onto the retina and does not change size. The cornea is the clear outer coating of the eye that helps to refract light onto the lens. However, it also does not change size. Therefore, the correct answer is C - iris.

The Colored Portion of the Eye That Contracts or Expands