In the visual system,the major purpose of the iris of the eye is to:
A)protect the eye from injury.
B)control the pupil size.
C)focus light on the retina.
D)transform light energy.

Question

Quizplus · Accepted Answer

The iris of the eye acts as a diaphragm that controls the amount of light entering the eye by changing the size of the pupil. The iris muscle expands or contracts to alter the size of the pupil and regulate the amount of light that reaches the retina. Therefore, the major purpose of the iris is to control the pupil size.

In the Visual System,the Major Purpose of the Iris of the Eye