Introduction
Nasolacrimal duct obstruction (NLDO) is a condition characterized by a blockage in the nasolacrimal duct, which drains tears from the eye into the nasal...
What is Nasolacrimal Duct Obstruction?
Nasolacrimal duct obstruction (NLDO) is when the nasolacrimal duct, which drains tears from the eye into the nasal cavity, becomes...