Dacryocystorhinostomy is a surgical procedure to restore the flow of tears into the nose from the lacrimal sac when the nasolacrimal duct does not function. Surgical procedures have long and possibly daunting names. ... The lacrimal sac, or tear sac, is the upper dilated end of the nasolacrimal duct, and is lodged in a deep groove formed by the lacrimal bone and frontal process of the maxilla. ... The nasolacrimal duct carries tears from the lacrimal sac into the nasal cavity. ...
A small incision is made on the side of the nose and some bone is removed to make a connection to the nose. Drains are left behind to prevent the gap from closing and are removed after a few months. The operation can also be performed endoscopic.
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