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Question
________ controls the amount of light entering the eye.
________ controls the amount of light entering the eye.
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Solution
The correct option is A Iris
Iris controls the amount of light entering the eye. This is regulated by the radial and circular muscles present in the iris. Radial muscles contract in dim light and dilates the pupil. This permits the maximum amount of light rays to enter the eye. On the other hand, circular muscles contract in bright light and causes the pupil to constrict. Thus, permitting minimal light rays to enter the eyes.
Iris controls the amount of light entering the eye. This is regulated by the radial and circular muscles present in the iris. Radial muscles contract in dim light and dilates the pupil. This permits the maximum amount of light rays to enter the eye. On the other hand, circular muscles contract in bright light and causes the pupil to constrict. Thus, permitting minimal light rays to enter the eyes.
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