title: POLYTHENE TUBES IN CANALICULUS SURGERY.
mesh_terms: D006801:Humans; D007765:Lacrimal Apparatus; D007767:Lacrimal Duct Obstruction; D020959:Polyethylene; D013514:Surgical Procedures, Operative
chemical_list: D020959:Polyethylene
keywords: LACRIMAL APPARATUS; LACRIMAL DUCT OBSTRUCTION; SURGERY, OPERATIVE