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Which of the following is used for controlling the amount of light entering the ...


Question

Which of the following is used for controlling the amount of light entering the eye?

Options

A) Cornea

B) Pupil

C) Iris

D) Cilary muscles

The correct answer is C.

Explanation:

Iris
(anatomy) The contractile membrane perforated by the pupil, which adjusts to control the amount of light reaching the retina, and which forms the colored portion of the eye (See pedia Iris (anatomy)).

Pupil
(anatomy) The hole in the middle of the iris of the eye, through which light passes to be focused on the retina.

From these definitions, I think "Iris" I the correct answer.

Explanation provided by Tochukwu Alukwu


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Discussion (2)

  • Very Correct
    Iris
    The iris is a flat and ring-shaped membrane behind the cornea of the eye with an adjustable circular opening in the center called a pupil. This is the structure that provides an individual with eye color.

    Together with the pupil, the iris is responsible for regulating the amount of light that gets into the eye. Too much or too little light can hamper vision. The muscular iris moves to shrink the pupil if there is too much light and widen it if there is not enough. This is an involuntary function, controlled by the brain

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  • Iris
    (anatomy) The contractile membrane perforated by the pupil, which adjusts to control the amount of light reaching the retina, and which forms the colored portion of the eye (See pedia Iris (anatomy)).

    Pupil
    (anatomy) The hole in the middle of the iris of the eye, through which light passes to be focused on the retina.

    From these definitions, I think "Iris" I the correct answer.

    Reply
    Like