What is the role of the iris in controlling the amount of light entering the eye?

Ans: The iris regulates the amount of light entering the eye by automatically adjusting the size of the pupil based on the light’s intensity. When there’s ample light, the iris contracts, reducing the pupil’s size to limit the light entering the eye. Conversely, in low-light conditions, the iris expands the pupil, allowing more light to enter and improve visibility.

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