A) alter the size of pupil
B) move nictitating membrane
C) refract light rays
D) move the lens forward and backward
Correct Answer: A
Solution :
At the juncton of sclera and cornea, the vascular coat sharply bends into the cavity of eye ball to form a thin and coloured portion known as iris. The smooth muscles found in iris, regulate the amount of light entering the eye ball by varying the size of the pupil.
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