Multiple choice

Name the structure responsible for controlling the diameter and size of the pupil and also determines the colour of the eye.

  1. Cornea

  2. Pupils

  3. Iris

  4. Retina

  5. None of these

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The iris is the colored muscular structure that controls pupil diameter for light regulation. The cornea is the clear front layer, pupils are openings (not structures), and the retina is the light-sensing layer at the back of the eye.