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What causes the size of pupil to decrease during bright light?

February 12, 2022
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What causes the size of pupil to decrease during bright light?

Q. What causes the size of pupil to decrease during bright light?

A.            contraction of circular muscles of iris

B.            contraction of radial muscles of iris

C.            relaxation of circular muscle of iris

D.            relaxation of radial muscle of iris

Answer: contraction of circular muscles of iris

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