Scientists think baby animals evolved to cry to alert their parents when in distress. Humans also shed a third type, ...

Experts say social-emotional tears related to sadness, stress, anxiety, overwhelming joy, or feeling sentimental are helpful ...

It happens when a parasite that can be found in water invades the eye, damaging the cornea, causing severe pain and ...

Chinese researchers studied 299 participants ages 18 to 45 with dry eye disease, assigning half of them to a laughter ...

Ever since I became a contact lens wearer many years ago, chronic dry eyes and I have become fast and familiar friends. That ...