title: Using Healon to identify the lumen of the sac.
authors.forename: J J
authors.initials: JJ
authors.lastname: Hurwitz
mesh_terms: D003608:Dacryocystorhinostomy; D006801:Humans; D006820:Hyaluronic Acid; D007766:Lacrimal Apparatus Diseases / Q000175:diagnosis*
chemical_list: D006820:Hyaluronic Acid