Many causes of epiphora are unrelated to anatomical problems in the nasolacrimal drainage apparatus. Problems in the upper lacrimal system have often been under-recognized as a cause of epiphora.

Conjunctivochalasis is an under-recognized cause of upper lacrimal system epiphora ... canaliculi can help to preserve normal anatomical drainage pathways.

This column reviews the anatomy of the nasolacrimal duct system in rabbits and describes the appropriate techniques for working up a rabbit with an ocular problem related to nasolacrimal drainage.