Iris is the structure that regulates the amount of light entering the posterior segment of the eye.
The colored disc-shaped membrane found in the eye of humans and various animals is called the iris.
- The pupil appears in the center of the iris: an opening that allows light to enter.
- It is located behind the cornea, constituting a separation between the posterior chamber and the anterior chamber of the eye.
- It helps to dilate or contract the pupil to allow more or less light to enter the eye.
Therefore, we can conclude that iris is the structure that regulates the amount of light entering the posterior segment of the eye.
Learn more here: https://brainly.com/question/14030934
