Canaliculitis is a relatively rare dacryocanal infection which occurs
mostly unilateral. It can easily be misinterpreted and not sufficientl
y treated. Typical agents of the canaliculitis are actinomyces, that c
an cause infections of the hollow spaces with formation of concrements
. The clinical courses of two patients are shown. One of them was trea
ted for a dacryocystitis for 3 years and the other one had been referr
ed to the eye hospital for chalazion removal. Only a microbiologic exa
mination including cultivation of the surgically obtained dacryolithes
and secretion enabled us to a reliable proof of the actinomyces and t
o an appropriate therapy for canaliculitis.