The tear glands located above each eyeball, called the lacrimal glands, continuously supply tear fluid that's wiped across the surface of your eye each time you blink your eyelids. Excess fluid drains through the tear ducts into the nose.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission.
Check out these best-sellers and special offers on books and newsletters from Mayo Clinic Press.
Thanks to generous benefactors, your gift today can have 5X the impact to advance AI innovation at Mayo Clinic.