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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:

Respuesta :

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.

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