Tear glands, also known as lacrimal glands, are small glands located above each eye. Their primary function is to produce tears, which help keep the eyes moist and comfortable. Tears also play a crucial role in protecting the eyes from irritants and infections. When we blink, tears spread across the surface of the eye, providing lubrication. There are three types of tears: basal tears, which keep the eyes moist; reflex tears, which occur in response to irritants like smoke or onions; and emotional tears, which are produced during strong feelings.