The size of your pupils varies throughout the day, but most people’s pupils fall within a particular size range. We’ll look at when and why your pupils change size. First, the range of “normal” pupil ...

Please provide your email address to receive an email when new articles are posted on . For all people, pupil size has an important role in balancing incoming light with depth of field to optimize ...

Some people can wiggle their ears, some can fold their tongues ... this man can dilate and constrict his pupils on demand. When you purchase through links on our site, we may earn an affiliate ...

A team of Johns Hopkins neuroscientists has worked out how some newly discovered light sensors in the eye detect light and communicate with the brain. The report appears online this week in Nature.

Neuroscientists have worked out how some newly discovered light sensors in the eye detect light and communicate with the brain. A team of Johns Hopkins neuroscientists has worked out how some newly ...