Congenital Nasolacrimal Duct Obstruction
Journal Article - Open Access
59th Medical Wing San Antonio United States
Pagination or Media Count:
Congenital nasolacrimal duct obstruction NLDO is a relatively common problem, occurring in up to 20 of infants in the first year of life.1 Although most patients are affected in one eye, NLDO is frequently bilateral. Symptoms range from mild epiphora to frank mattering of the eyelids with a mucopurulent discharge. The site of the obstruction is most commonly at the distal end of the nasolacrimal duct valve of Hasner. Other causes of epiphoradischarge should be ruled out including primary congenital glaucoma, dacryocystitis, conjunctivitis, or corneal infections prior to making the diagnosis of NLDO. Clinical findings of NLDO include increased tear lake as well as asymmetric or positive dye disappearance test. The dye disappearance test is performed by placing fluorescein dye in both eyes and waiting for 5 minutes. A positive test is either asymmetric clearing from the suspected involved eye, or failure to clear in cases of bilateral NLDO.
- Medicine and Medical Research