Tags: Disease.
Congenital nasolacrimal duct obstruction (CLDO) is the condition in which a tear duct has failed to open at the time of birth. Around 6% of infants have CLDO usually experiencing a persistent watery eye even when not crying. The condition is also known as dacryostenosis. If a secondary infection occurs (Dacryocystitis) purulent (yellow / green) discharge may be present.