Neural Control and CoordinationHard

Question

Function of iris is to

Options

A.move lens forward and backward
B.refract libht rays
C.bring about movements of eye lids
D.alter the size of pupil

Solution

Iris controls the amount of light that reaches the photosenors at the back of the eye. It consists of circular sphincter and radial dilators. The function of iris is to alter the size of pupil.

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