The major purpose of the iris is to
A) protect the eye from injury.
B) regulate the amount of light entering the eye.
C) focus light on the retina.
D) transform light energy.

Question

Quizplus · Accepted Answer

The iris is the colored part of the eye that regulates the amount of light entering the eye by changing the size of the pupil. This is important for maintaining appropriate levels of light and preventing damage to the retina from excessive light. The other choices are not accurate descriptions of the iris's main function.

The Major Purpose of the Iris Is to