Canalicular Stenosis Secondary to Chemotherapeutic Agents

The lacrimal system of the eye is responsible for the production and drainage of tears that lubricate the ocular surface. It is lined by a highly proliferative mucous membrane, and the balance between the production and drainage determines whether an eye is well lubricated, dry, or has excessive tearing, also known as epiphora (Fig. 1). Epiphora can be a result of excessive tear production or reduced tear drainage (lacrimal outflow). Drainage...