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Blocked tear duct
Alternative namesDacryostenosis; Blocked nasolacrimal duct
DefinitionA partial or complete obstruction in the duct system that carries tears away from the surface of the eye to the nose.
Causes, incidence, and risk factors
Tears from the surface of the eye are normally drained into the nose by a convoluted tube called the nasolacrimal duct. If this duct is blocked, the tears will accumulate and overflow onto the cheek, even when a person isn't crying.
In children, the duct may not be completely developed at birth. This often resolves on its own. In adults, the duct can be damaged by infection, injury or tumor.
SymptomsThe symptom is increased tearing , which overflows onto the face or cheek.
Signs and tests
For children with incomplete nasolacrimal duct development, massaging the lacrimal sac area several times a day, as instructed by an ophthalmologist, may be enough to open the tear duct. Persistent cases may require opening by a probing procedure. This may occasionally require anesthesia.
Congenital tear duct blockage often clears spontaneously by 6 months of age. If it does not clear on its own, the outcome is still likely to be good with treatment.
Tear duct obstruction in adults has a variable outcome depending on the cause.
Tear duct blockage may increase the risk of eye infections.
Calling your health care provider
Anyone with tear overflow onto the cheek requires examination, since one of the possible causes is a tumor. Earlier treatment is more successful, and may be lifesaving.
Many cases cannot be prevented. Adequate treatment of nasal infections and conjunctivitis may reduce risk. Safety measures may reduce the risk of trauma.
Update Date: 11/4/2002Raymond S. Douglas M.D., Ph.D. Department of Ophthalmology, UCLA Medical Center, Los Angeles, CA. Review provided by VeriMed Healthcare Network.
Last updated: Tue, 06 Jan 2009 00:20:03 GMT