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 . Smaller pupil area measured in patients with acute HF was predictive of all-cause mortality and HF readmission, ...

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 ...

The pupillary light response helps our eyes see the world around us in various lighting conditions ranging from bright, sunny days to dark, moonlit nights. Like a camera's aperture, this adaptive ...

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.