Question:

The amount of light entering the human eye is controlled by:

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The iris adjusts the pupil size to regulate light entry into the eye.
Updated On: Oct 27, 2025
  • ciliary muscles
  • pupil
  • cornea
  • iris
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The Correct Option is D

Solution and Explanation

The iris is a circular muscle that controls the size of the pupil, regulating the amount of light entering the eye Thus, the correct answer is \( \mathbf{(D) \text{iris}} \).
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