The human body is designed to deliver early warning signals when something's wrong. Your job is to interpret them, which can sometimes be difficult to do. After all, not all of your body's warning ...

Blinking keeps the eye lubricated. With each blink, a tiny tear comes out of your upper eyelid and helps wash germs, dust, and other micro gunk away. [CLINK CLINK] So if someone challenges you to ...

We have sophisticated diagnostic tools nowadays that can image the eyelid glands, that can measure the tear quantity and quality, that can measure the blink rate. You can tell if someone doesn't ...