It is essentially an imbalance between the amount of tears being produced by the tear gland and amount that can be removed by evaporation and the tear drainage system. Problems with the eyelid or narrowing of the drainage canals can prevent tears being drained into the nose.
Our doctor will examine you to see if your watering is due to a problem in the tear drainage system. This will include syringing water through the tear ducts to see whether there is a blockage. A endoscope/telescopic is used to examine the inside of your nose. Sometimes a x-ray examination of the tear drainage pathway (a dacryocystogram or dacryoscintillogram) is needed to help determine the cause of your watery eye or the site of obstruction to tear flow.
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