Question

Name the part of eye which control the light entering.

Answer 1

Iris

Iris is the part of eye which controls the light entering.

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Answer 2

The iris regulates the amount of light entering the eye by adjusting the size of the pupil.

a) if the intensity of the light is low, the iris makes the pupil to expand to allow more light to enter the eye.
b) If the intensity of light is high, the iris makes the pupil to contract in order to decrease the amount of light.

hope this helps