Tear duct surgery, also known as dacryocystorhinostomy (DCR), is a surgical procedure used to treat blocked tear ducts, which can cause excessive tearing, infections, and eye irritation. This condition, known as nasolacrimal duct obstruction, prevents tears from draining properly from the eyes into the nose.

Tear duct surgery creates a new drainage pathway for tears, restoring normal tear flow and relieving symptoms. It can be performed externally (through a small incision on the face) or endoscopically (through the nose, without visible scars).