A blink of an eye seems natural and instantaneous, but is it? Without a functioning eyelid, the eye can become dry, irritated and eventually lose the ability to see clearly. The researchers studied ...

Share on Pinterest What explains rapid eye movements during sleep? Researchers may be getting closer to an answer. Image credit: Alexandr Ivanets/Stocksy. When animals change their head direction as ...

A complex system of nerves and muscles enables the human eye to blink, gaze, and shift focus. The trochlear nerve is one of six cranial nerves that carry electrical impulses from the brain to the eye.

Learn what afterimages can teach us about how our brains predict our visual movements. If you’ve ever been caught off guard by bright lights coming around a corner, or the sun suddenly hitting your ...

Eye twitching is an involuntary movement that can be harmless or signify a more serious condition, such as multiple sclerosis. If twitching occurs for more than a few days, it is important to speak ...