Mind blanking isn’t daydreaming. It's something more akin to meditation — but not quite the same. On any given day, your ...

In bright conditions, your pupils constrict to limit light entry, protecting your retina and sharpening your vision. When darkness falls, your pupils dilate to capture more available light ...

Learning to deal with complicated cases and difficult situations, whether predictable or completely unexpected, is an important part of the skill set of a surgeon.The needed tools are not only ...

However, it is not just light that our pupils respond to. It’s also well established that our pupils constrict when focusing on a nearby object, and dilate in response to cognitive effort or emotional ...

Multiple pharmaceutical agents in clinical trials promise to offer patients eye drops for the management of presbyopia.

In low light, pupils dilate (widen) to allow in more light so you can see. In the bright light, pupils constrict (narrow) to prevent too much light from entering the eye and causing a "white out." The ...

With enlarged overhanging scales and vertical pupils, its eyes appear silvery ... They can also be dangerous when threatened due to their size and ability to constrict prey tightly with their powerful ...