Physiology of the eye

Pupil & iris

The pupil is the central opening in the iris muscle. The iris controls pupil size in order to regulate the amount of light entering the eye.

Pupil size changes during sensory adaptations such as light and dark adaptation.

Sources:

  1. Mark D. Fairchild (2013). Color Appearance Models. 3rd edition. John Wiley & Sons, Ltd. Pages 4-5
  2. Pupil. American Academy of Opthalmology. https://www.aao.org/eye-health/anatomy/pupil
  3. How eyes work. . https://www.nei.nih.gov/learn-about-eye-health/healthy-vision/how-eyes-work