Light bounces or reflects off most objects, but not everything. When light hits your eye, it actually goes right into it through the opening at the front. The eye then sends signals to the brain.

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 your skin, protecting your eyes from exposure to ultraviolet (UV) rays is essential to prevent eye damage and other ...

It's a phenomenon called "eye black." Natural skin absorbs some light, but reflects the rest. This reflection can cause glare and impair vision. Black stripes are supposed to prevent this by ...

One theory is that in the winter, pressure inside the animal's eye builds due to the effort of keeping the pupils dilated and large for months on end. The pressure squeezes fluid out of the tapetum ...