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A blocked tear duct is a partial or complete blockage in the pathway that carries tears from the surface of the eye into the nose. Alternative Names: Dacryostenosis; Blocked nasolacrimal duct; Nasolacrimal duct obstruction (NLDO).
About 1 in 20 babies are born with a block in one or both of their tear ducts. About 90% of children with congenital blocked tear ducts get better spontaneously without treatment by the age of 12 months
Many cases cannot be prevented. Proper treatment of nasal infections and conjunctivitis may reduce the risk of having a blocked tear duct. Using protective eyewear may help prevent a blockage caused by injury.
The Association For Research in Vision and Ophthalmology (ARVO)