How many types of tears are there?


There are three types of tears.

Basal tears are the constant tears in our eyes that keep them drying out. The body produces 5 to 10 ounces of basal tears each day. These tears drain through the nasal cavity, which explains why so many people develop runny noses after they have a good cry.

Reflex tears are another type of tears. They protect the human eye from harsh irritants such as onions, smoke and dust. When an irritant threatens your eyes, the sensory nerves in your cornea let the brain stem know about the threat and it sends hormones to the glands in the eyelids. The hormones then cause the eyes to produce tears, which rids them of the irritating substances.

Emotional tears are another kind of tears. These tears begin in the cerebrum, which registers sadness. The endocrine system then releases hormones to the ocular area, which causes tears to form. Emotional tears are common among people who watch sad movies or who suffer a personal loss.

Continue Learning about Eye and Vision

Eye and Vision

Eye and Vision

The leading cause of blindness is an eye disease such as cataracts, glaucoma or macular degeneration. Each can be slowed or treated through regular eye exams. On a daily basis, doctors recommend wearing sunglasses to guard against ...

damage from the suns ultraviolet rays and using protective goggles during sports and certain household projects to protect against injury.

Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.