title: Wide-angle viewing lens for vitrectomy.
abstract: OBJECTIVE
  To report a new wide-angle viewing contact lens for vitrectomy.
  
  
  METHODS
  New surgical instrument.
  
  
  METHODS
  The new wide-angle viewing lens is made of glass and polymethyl methacrylate without a plastic rim. The diameter is reduced to 16.2 mm. In addition to a smaller diameter than the currently available lens, the new lens is partially cut to reduce the lens diameter.
  
  
  RESULTS
  A smaller diameter makes it possible to eliminate contact between surgical instruments and the wide-angle lens. Instruments can be inserted through sclerotomies without removing the wide-angle lens. The optical properties are otherwise identical to the standard wide-angle lens.
  
  
  CONCLUSIONS
  The new wide-angle viewing lens may be easier to use in vitreous surgery.
authors.affiliation: Department of Ophthalmology, Osaka University Medical School, Suita, Japan. nakatak@ccf.org
authors.forename: Ko
authors.initials: K
authors.lastname: Nakata
authors.forename: Masahito
authors.initials: M
authors.lastname: Ohji
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Ikuno
authors.forename: Shunji
authors.initials: S
authors.lastname: Kusaka
authors.forename: Fumi
authors.initials: F
authors.lastname: Gomi
authors.forename: Motohiro
authors.initials: M
authors.lastname: Kamei
authors.forename: Denwood F
authors.initials: DF
authors.lastname: Ross
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Tano
mesh_terms: D003261:Contact Lenses; D005898:Glass; D006801:Humans; D055095:Optics and Photonics / Q000295:instrumentation; D019904:Polymethyl Methacrylate; D014821:Vitrectomy / Q000295:instrumentation*
chemical_list: D019904:Polymethyl Methacrylate