which part of the eye regulates the size of the pupil?!
Question: Which part of the eye regulates the size of the pupil?
Answers:
Best Answer - Chosen by Voters
The pupil physically does not exist. Its actually a hole in the front of the eye that gets bigger/smaller from the iris contracting.
Here's a useful video that shows the iris in action:
http://www.youtube.com/watch?v=MoDob0Oe1…
The pupil is an opening in the iris. Two muscles in the iris determine its size and the muscles are controlled by the anount of light reaching the retina.