I connected with Central High School students from his office in Washington, D.C. by hosting a live video chat and answering dozens of questions. As one of the youngest members of Congress, Representative Smith has embraced new technology to stay connected with constituents when he is in Washington, D.C.
Pupil is an opening, thus is controls the amount of light that enters our eye. The pupil in your eye is actually a hole in which light and pictures can be viewed. Stuff doesn't go in it because our pupils are covered with a protective layer called the lense. To control the amount of light entering the eye.
The size of the pupil is controlled by the iris. The iris has a circular muscle layer that constricts the pupil and a radial muscle layer that dilates the pupil. Parasympathetic neurons control the circular muscle layer while sympathetic neurons control the radial muscle layer.