What is the function of the iris?
It focuses the light onto the light-sensor cells at the back of the eye.
It converts light into electrical signals that are sent to the brain through the optic nerve.
Its curved surface helps to focus light entering the eye.
It contracts and expands to control the amount of light that enters the eye.
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it contract and expand to control the amount of lighy that enters the eye....
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It contracts and expands to control the amount of light that enters the eye.
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