Skip to Content
Home > Wellness Resources > Health Library > Pupil
The pupil is the black area in the center of the iris, the colored
part of the eye. The iris controls the size of the pupil in response to light
outside the eye so that the proper amount of light is let into the eye.
Light passes through the pupil to the back of the eye, where an
image is formed of what the eye is looking at.
Current as of:
May 23, 2016
Kathleen Romito, MD - Family Medicine & Christopher J. Rudnisky, MD, MPH, FRCSC - Ophthalmology
To learn more about Healthwise, visit Healthwise.org.
© 1995-2016 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated.