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Last Update: April,
2011 12:06 PM
Nasolacrimal Duct Blockage
Blockage of the nasolacrimal duct (dacryostenosis) can result from inadequate development of the nasolacrimal system at birth, a chronic nasal infection, severe or recurring eye infections, or fractures of the nasal or facial bones. Blockage can be partial or complete.
Blockage caused by an immature nasolacrimal system usually results in an overflow of tears that runs down the cheek (epiphora) from one eye or, rarely, from both eyes in 3- to 12-week-old infants. This type of blockage usually disappears without treatment by the age of 6 months, as the nasolacrimal system develops. Sometimes the blockage resolves faster when parents are taught to milk the duct by gently massaging the area above it with a fingertip.
Regardless of the cause of the blockage, if inflammation of the conjunctiva (conjunctivitis) develops, antibiotic eyedrops may be needed. If the blockage doesn't clear up, an eye specialist (ophthalmologist) may have to open the duct with a small probe, usually inserted through the duct opening at the corner of the eyelid. Children are given general anesthesia for this procedure, but adults need only local anesthesia. If the duct is completely blocked, more extensive surgery may be needed.