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.

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.

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