Dry Eyes and Tearing
The lacrimal glands, located behind the upper eyelids, produce tears that moisten our eyes. When we blink, the eyelids spread a film of fresh tears across the eye and pump excess tears into the nasolacrimal duct or tear drain. Without this mechanism working correctly, dry eyes become a chronic problem.
When the lacrimal gland fails to produce enough tears, the surface of your eye dries out and often causes burning, stinging, and a sandy or gritty sensation. Artificial tears and lubricating ointments may help relieve dry eye symptoms. If these lubricants do not help, closing the tear drain may be helpful or in extreme cases surgery may be required to protect your eye.
If the lacrimal gland is working properly, but your tears do not drain through the tear duct because it is blocked, your eye may feel watery and tears may even overflow onto your cheek. In some cases, you may be able to simply apply warm compresses and use antibiotic drops; but often, surgery to relieve the obstruction is the most effective treatment.