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).
Study reported a birth prevalence of 1 in 3,884. Only 2-4% of newborns exhibit the clinical phenomena of nasolacrimal duct obstruction.
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).