The part of the human eye that controls the amount of light entering through the pupil is the:
AIris
BRetina
CCornea
DLens
Answer & Solution
Correct answer: A. Iris
The iris is the coloured muscular ring of the eye. It expands or contracts to change the size of the pupil — making it bigger in dim light to let in more light, and smaller in bright light to let in less.
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