Dry eye disease happens when the lacrimal glands do not make enough tears, or the tears do not have the right balance of ...

Tears seem simple, but the tiny glands that produce them are among the least understood organs in the human body. By growing miniature human tear glands in the lab and coaxing them to “cry,” ...

Whether they are tears of pain or tears of joy, the truth about tears is that these tiny, salty droplets are essential for the nutrition, lubrication, and protection of our eyes. Why it matters — ...