title: Two cases of intraoperative anterior chamber angle observation using ophthalmic endoscope in viscocanalostomy.
abstract: OBJECTIVE
  To report endoscopic findings in the anterior chamber angle during injection of viscoelastic material in viscocanalostomy (VCS).
  
  
  METHODS
  Observational case reports.
  
  
  METHODS
  Two cases of primary open-angle glaucoma were treated with VCS and cataract surgery. Immediately before and during injection of viscoelastic material into Schlemm's canal, the anterior chamber angle was observed using an ophthalmic endoscope.
  
  
  RESULTS
  In both cases, we observed viscoelastic material in Schlemm's canal and leakage of viscoelastic material and blood from Schlemm's canal into the anterior chamber away from the injection site of the viscoelastic material. In one case, indocyanine green-stained viscoelastic material was not in Schlemm's canal the day after surgery.
  
  
  CONCLUSIONS
  In VCS, Schlemm's canal was filled and was disrupted after viscoelastic material injection. Disruption of the inner wall of Schlemm's canal and juxtacanalicular connective tissues may contribute to the intraocular pressure reduction associated with VCS.
authors.affiliation: Senshokai Eye Institute, Kyoto, Japan. kaz0726@abelia.ocn.ne.jp
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Takahashi
authors.forename: Masaki
authors.initials: M
authors.lastname: Tanito
authors.forename: Mitsunobu
authors.initials: M
authors.lastname: Yokoyama
authors.forename: Masami
authors.initials: M
authors.lastname: Park
authors.forename: Etsuo
authors.initials: E
authors.lastname: Chihara
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000867:Anterior Chamber / Q000473:pathology*; D002387:Cataract Extraction; D004396:Coloring Agents; D003238:Connective Tissue / Q000473:pathology; D003941:Diagnostic Techniques, Ophthalmological / Q000295:instrumentation*; D004724:Endoscopy / Q000379:methods*; D005260:Female; D005902:Glaucoma, Open-Angle / Q000601:surgery*; D006801:Humans; D006820:Hyaluronic Acid / Q000008:administration & dosage; D007208:Indocyanine Green; D007267:Injections; D007432:Intraoperative Period; D014129:Trabecular Meshwork / Q000473:pathology*
chemical_list: D004396:Coloring Agents; D006820:Hyaluronic Acid; D007208:Indocyanine Green