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.

Eye problems are common in both laboratory and pet rabbits. This column reviews the anatomy of the nasolacrimal duct system in rabbits and describes the appropriate techniques for working up a ...

Canaliculitis is an infection of the lacrimal drainage system, specifically affecting the canaliculi, which are small ducts that drain tears from the eye into the nasal cavity. This condition can ...

One can see that the problems associated with the upper lacrimal drainage system can be complex. We can begin to consider these problems by first establishing whether true epiphora exists.