Question

The amount of light entering in eye is controlled by:

A Iris Correct Answer Incorrect Answer
B Ciliary muscle Correct Answer Incorrect Answer
C Suspensory ligaments Correct Answer Incorrect Answer
D Pupil Correct Answer Incorrect Answer

Solution

The Iris automatically adjust the size of pupil according to the intensity of light received by eye. For example, if it is day time , the iris contracts the pupil and reduces the amount of light entering. If it is night, iris expands the pupil so that more light may enter the eye. In this way the amount of light entering in eye is controlled by iris.

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