Tears are usually seen as a sign of sadness or pain, but it’s not uncommon for people to cry during life’s most joyful moments ...

Each time you blink, the action drags tears along the surface of your eye. This keeps it wet, clean, and healthy. If your glands don't produce enough tears, you can get a condition called aqueous ...

If your glands do not make enough tears, you may experience a condition called chronic dry eye. One uncommon form of dry eye is called aqueous-deficient dry eye (ADDE), also known as aqueous tear ...