We’ll look at when and why your pupils change size. First, the range of “normal” pupil sizes, or, more accurately, what the average is.
Pupils ten… See more

Pupils are the black center of the eye. Their function is to let in light and focus it on the retina … See more

A variety of factors can influence pupil size, and not all of them have to do with light and distance. Some of these other factors include:
•your health… See more

Concussion
A concussion is a brain injury that results from the brain smacking against the hard skull during a fall, a hit to the head, or a fast impact invo… See more