title: Influence of 360-degree enhanced optic edge design of a hydrophilic acrylic intraocular lens on posterior capsule opacification.
abstract: OBJECTIVE
  To compare the rate of posterior capsule opacification (PCO) with the single-piece hydrophilic acrylic foldable Rayner Centerflex 570H intraocular lens (IOL), which has a sharp optic edge design excluding the optic-haptic junction, and the Rayner C-flex 570C IOL, which has an improved 360-degree sharp edge.
  
  
  METHODS
  Department of Ophthalmology, University of Heidelberg, Heidelberg, Germany.
  
  
  METHODS
  As part of a multicenter U.S. Food and Drug Administration (FDA) study, 42 patients who had implantation of a C-flex IOL in 1 eye after uneventful phacoemulsification were enrolled. Six and 12 months postoperatively, PCO was evaluated by retroillumination photographs using Evaluation of Posterior Capsule Opacification (EPCO) 2000 image-analysis software. The data were then compared with those in a matched group of patients with a Centerflex IOL who participated in a previous FDA study.
  
  
  RESULTS
  The mean age of the patients with the C-flex IOL was 71.5 years +/- 8.2 (SD) There was a statistically significant difference in EPCO scores between the C-flex group and Centerflex group. Six months after surgery, the mean EPCO value (total IOL optic) was 0.07 +/- 0.17 in the C-flex group (n = 37) and 0.20 +/- 0.20 in the Centerflex group (n = 36) (P<.01, Wilcoxon test). By 12 months, the mean had increased to 0.16 +/- 0.20 in the C-flex group (n = 37) and 0.35 +/- 0.22 in the Centerflex group (n = 31) (P<.01, Wilcoxon test).
  
  
  CONCLUSIONS
  The C-flex IOLs showed good functional results and significantly lower PCO formation than the earlier model Centerflex IOL. The enhanced edge of the C-flex IOL seemed to improve PCO prevention clinically.
authors.affiliation: International Vision Correction Research Centre, Department of Ophthalmology, University of Heidelberg, Heidelberg, Germany.
authors.forename: Yutaro
authors.initials: Y
authors.lastname: Nishi
authors.forename: Tanja M
authors.initials: TM
authors.lastname: Rabsilber
authors.forename: Il-Joo
authors.initials: IJ
authors.lastname: Limberger
authors.forename: Andreas J
authors.initials: AJ
authors.lastname: Reuland
authors.forename: Gerd U
authors.initials: GU
authors.lastname: Auffarth
mesh_terms: D000180:Acrylic Resins; D000368:Aged; D000369:Aged, 80 and over; D019923:Capsulorhexis; D002386:Cataract / Q000209:etiology / Q000517:prevention & control*; D015350:Contrast Sensitivity / Q000502:physiology; D005260:Female; D006801:Humans; D007903:Lens Capsule, Crystalline / Q000473:pathology*; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D011183:Postoperative Complications / Q000517:prevention & control*; D011446:Prospective Studies; D011474:Prosthesis Design; D014792:Visual Acuity / Q000502:physiology
chemical_list: D000180:Acrylic Resins