Influence of 360-degree enhanced optic edge design of a hydrophilic acrylic intraocular lens on posterior capsule opacification

J Cataract Refract Surg. 2007 Feb;33(2):227-31. doi: 10.1016/j.jcrs.2006.10.020.


Purpose: 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.

Setting: 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.

Publication types

  • Comparative Study

MeSH terms

  • Acrylic Resins
  • Aged
  • Aged, 80 and over
  • Capsulorhexis
  • Cataract / etiology
  • Cataract / prevention & control*
  • Contrast Sensitivity / physiology
  • Female
  • Humans
  • Lens Capsule, Crystalline / pathology*
  • Lens Implantation, Intraocular*
  • Lenses, Intraocular*
  • Male
  • Middle Aged
  • Phacoemulsification*
  • Postoperative Complications / prevention & control*
  • Prospective Studies
  • Prosthesis Design
  • Visual Acuity / physiology


  • Acrylic Resins