Congenital Nasolacrimal Duct Obstruction

Congenital Nasolacrimal Duct Obstruction (CNLDO) also known as a blocked tear duct is a very common condition in young children particularly infants. It occurs when the tear drainage system is not fully open. Tears normally drain through tiny openings in the inner corner of the eyelids and move down the nasolacrimal duct into the nose. When the nasolacrimal duct is blocked, tears are unable to drain properly causing constant tearing, watery eyes, crusty eyelids or mucous discharge.

Children with CNLDO are more prone to ocular infections such as conjunctivitis hence, if there are signs such as redness, swelling or yellow discharge an ophthalmologist should be consulted about the best course of action, and  particularly if the infections are recurrent.

CNLDO usually resolves within the first year of life. However, if not improved by 9-12 months a consult with an ophthalmologist may be warranted to discuss a surgical option to open the blocked duct.