Nasolacrimal drainage apparatus

Dr Craig Hacking and Dr Henry Knipe et al.

The nasolacrimal (drainage) apparatus consists of:

Tears produced by the lacrimal gland, accessory lacrimal glands of Krause, Wolfring and Zeis, and Meibomian glands track medially along the eyelid margins and collect at the lacrimal lake at the inner canthus. The nasolacrimal drainage apparatus drains tears in a descending course through the lacrimal canaliculi leading to the lacrimal sac which drains into the and nasolacrimal duct in the nasolacrimal canal of the maxilla to the inferior nasal meatus below the inferior turbinate in the nasal cavity

Note that the nasolacrimal apparatus is not to be confused with the lacrimal apparatus, which also includes the lacrimal gland. 

Related pathology

Anatomy: Head and neck
Share article

Article information

rID: 26823
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • Nasolacrimal apparatus

Support Radiopaedia and see fewer ads

Cases and figures

  • Drag
    Case 1: normal dacryocystogram
    Drag here to reorder.
  • Updating… Please wait.
    Loadinganimation

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.