title: Intraocular lens capture in combined cataract extraction and pars plana vitrectomy: comparison of 1-piece and 3-piece acrylic intraocular lenses.
abstract: OBJECTIVE
  To report and compare the incidence of pupillary capture and posterior synechiae formation after combined cataract extraction and pars plana vitrectomy (PPV) with a 1-piece versus a 3-piece acrylic intraocular lens (IOL).
  
  
  METHODS
  Royal Alexandra Hospital Eye Clinic, University of Alberta, Edmonton, Alberta, Canada.
  
  
  METHODS
  Comparative case series.
  
  
  METHODS
  Consecutive patients who had combined cataract extraction with PPV were retrospectively reviewed. The outcomes in patients who received a 1-piece acrylic IOL and those who received a 3-piece acrylic IOL were compared. The proportion of patients with pupillary IOL capture and/or posterior synechiae postoperatively was recorded.
  
  
  RESULTS
  The cohort comprised 145 patients. All cases of IOL capture occurred in eyes with a 1-piece IOL (n = 7; 7.7%); the difference between the 1-piece IOL group and the 3-piece IOL group was statistically significant (P = .043). There was no significant difference between the 2 IOL types in the rate of posterior synechiae formation. Regression analysis showed that the odds of posterior synechiae formation were significantly higher in cases in which perfluoropropane (C(3)F(8)) (odds ratio [OR], 24.01; P = .006), sulfur hexafluoride (SF(6)) (OR, 25.23; P = .007), or silicone oil (OR, 47.78; P<.001) was used.
  
  
  CONCLUSIONS
  The incidence of IOL capture was significantly greater after implantation of a 1-piece IOL than after implantation of a 3-piece IOL during combined cataract extraction and PPV. Posterior synechiae formation was associated with the use of silicone oil, SF(6), or C(3)F(8).
authors.affiliation: Department of Ophthalmology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada. crudnisk@ualberta.ca
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Rudnisky
authors.forename: Joseph
authors.initials: J
authors.lastname: Cheung
authors.forename: Jalal A
authors.initials: JA
authors.lastname: Nanji
mesh_terms: D000180:Acrylic Resins; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002387:Cataract Extraction; D005260:Female; D005466:Fluorocarbons / Q000008:administration & dosage; D006801:Humans; D007499:Iris Diseases / Q000209:etiology*; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D011474:Prosthesis Design; D012189:Retrospective Studies; D012307:Risk Factors; D012827:Silicone Oils / Q000008:administration & dosage; D013459:Sulfur Hexafluoride / Q000008:administration & dosage; D000267:Tissue Adhesions; D014821:Vitrectomy
chemical_list: D000180:Acrylic Resins; D005466:Fluorocarbons; D012827:Silicone Oils; C042852:perflutren; D013459:Sulfur Hexafluoride