Causes of Watering eye

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Tear overproduction (lacrimation) is usually caused by some form of irritation from infection, conjunctivitis, a foreign body, a corneal ulcer, an ill-fitting contact lens or even a lens lost high up behind the upper lid.

Lacrimal duct obstruction may result from swelling of the lining of the narrow tear passage, obstruction by mucus, pus or cellular debris. It can also be caused by damage to the lining from an infection that has led to permanent closure by healing.

It can also be caused by obstruction from swelling of the lining of the nose at the lower end of the duct. When this happens in a baby is generally because the duct hasnâ€™t yet opened up.

A common cause of eye watering in older people is ectropion. This means that the lower eyelid has fallen away from the eyeball so that the tiny hole into which the tears drain is no longer in the tear pool.