Nasolacrimal disorders and their treatment.

Dysfunction of the excretory part of the nasolacrimal system may be congenital in otherwise normal infants or associated with congenital facial anomalies. It may also occur as a result of soft-tissue trauma to the face and naso-orbital fractures. Dacryocystorhinostomy and conjunctivodacryocystorhinostomy are discussed as treatment techniques.