As one walks into a brightly lit room, the black structure in the center of one's eye seems to shrink to a tiny black dot. This response is caused by the action of the eye structure called the:

Question

Biology

Brendan Lowe

7 October, 12:15

As one walks into a brightly lit room, the black structure in the center of one's eye seems to shrink to a tiny black dot. This response is caused by the action of the eye structure called the:

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Answers (1)

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Kira Elliott · Answer 1

Iris

Explanation:

The Iris is a circular, thin structure present in the eye. The main function of the Iris is to control the size and diameter of the pupil. The Iris is also responsible for the amount of light reaching the retina. The colour of the eye is defined by the Iris. The iris is made up of smooth muscle fibers, connective tissue and pigments.