title: [Holzwig iris retractor and use in narrow pupils].
abstract: BACKGROUND
  The objective was to develop an easy to handle tool for temporary implantation to dilate narrow pupils.
  
  
  METHODS
  High molecular PMMA was used to lathe cut a v-shaped device with sides of 6.9 mm length, 0.8 mm height and 0.4 mm width which opens 7.0 mm. Positioning holes of 0.5 mm diameter are located in the caudal ends of the sides. The HIR was used during cataract extraction in 24 patients with mydriatic-resistant pupils, amblyopia or distinctive macula degeneration.
  
  
  RESULTS
  In all 26 cases cataract extraction was made easier due to physiologically dilated pupils. The risk of an intraoperative miosis was effectively eliminated. In two cases removal was difficult as the lower tunnel lip interfered with the removal of the HIR.
  
  
  CONCLUSIONS
  In comparison with the commercially available devices, the HIR is the simplest, safest and most physiologic alternative.
authors.affiliation: Marien-Hospital, Düsseldorf.
authors.forename: D H
authors.initials: DH
authors.lastname: Holzwig
mesh_terms: D000550:Amblyopia / Q000601:surgery*; D002387:Cataract Extraction / Q000295:instrumentation*; D004867:Equipment Design; D006801:Humans; D007498:Iris / Q000601:surgery; D007910:Lenses, Intraocular; D008268:Macular Degeneration / Q000601:surgery*; D011681:Pupil Disorders / Q000209:etiology / Q000601:surgery*; D013525:Surgical Instruments