"Miosis" is a medical term that describes the constriction of the pupils. Learn its causes, symptoms, and how to treat it.

For years, scientists thought that pupils â those tiny black circles in the middle of our eyes â dilate and become large when we inhale and constrict to their smallest size when we exhale.

Just admit it, goat eyes look weird! It's the pupils, mostly, but goats can also do things with their eyes that humans just can't. A study out of the University of California, Berkeley looked at a ...

Flash photos typically produce a red reflection in people’s eyes, but sometimes that reflection can appear white or gray, ...

Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than ...

Like the aperture in a camera, the pupil controls how much light reaches the eye. It is therefore fundamental to our vision and how we perceive our surroundings. Three mechanisms that can change ...

pupil movement might one day be used to detect disorders such as insomnia and post-traumatic stress disorder, or even a comatose patient’s recovery. We haven’t yet figured out if eyes are ...

Our pupils are never static; they constantly adjust in response to both external and internal factors. The most well known is that they control how much light enters the eye, just like a camera ...