H04: Disorders of lacrimal system
H04.2: Epiphora
The lacrimal gland is above the outer corner of the eye. The lacrimal gland produces the tear fluid for the eye. The film of fluid (tear film) on the eye, together with the conjunctiva and the eyelids, protects the eye from external influences. Tear fluid flows out of the eye via the tear ducts. The tear ducts begin in the inner edge of the upper and lower eyelids. In both places there is a small opening that opens into a narrow channel. The channels join and carry the tear fluid to the inside of the nose.
A watering eye can have different causes. Excess tear fluid may be being produced in the lacrimal gland. This happens if the eye is being irritated, for example. It may also be that the tear fluid is unable to drain away from the eye to the nose via the tear ducts.
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