Are tears good for me?

Absolutely! Tears, which flow from tear glands into your eyes through tiny tear ducts, wash the eyeballs and carry away dust and dirt. Tears, which contain salt, kill germs and keep the cornea (the transparent front part of the eye) moist. Some of the tears drain out of your eyes through tear ducts, which are tiny tubes that run between your eyes and your nose. That is why people almost always blow their nose after they cry.

Tears form when we are sad, but tears have another purpose, too: they help keep dirt and dust out of our eyes.