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Function of iris is to...

Function of iris is to

A

move lens forward and backward

B

refract light rays

C

bring about movements of eyelids

D

alter the size of pupil

Text Solution

Verified by Experts

The correct Answer is:
D
Iris controls the amount of light that reaches the photosensors at the back eye. It consists of circular sphincters and radial dilators. The function of iris is to alter the size of pupile.
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