title: Effect of four different intraocular lenses on posterior capsule opacification.
abstract: OBJECTIVE
  To evaluate the impact of 4 different intraocular lenses (IOLs) on posterior capsule opacification (PCO) by comparing the neodymium: yttrium-aluminum-garnet (Nd:YAG) laser capsulotomy rates.
  
  
  METHODS
  This retrospective study included 4970 eyes of 4013 cataract patients who underwent phacoemulsification and IOL implantation between January 2000 and January 2008 by the same surgeon at one clinic. Four different IOLs were assessed. The outcome parameter was the incidence of Nd:YAG laser posterior capsulotomies.
  
  
  RESULTS
  An Nd:YAG laser posterior capsulotomy was performed in 153 (3.07%) of the 4970 eyes. The mean follow-up time was 84mo for all of the IOL groups. The percentage of eyes developing PCO was significantly greater for the acrylic hydrophilic IOLs than for the hydrophobic IOLs, although eyes with acrylic hydrophilic IOLs did not require Nd:YAG laser capsulotomy as soon as eyes with acrylic hydrophobic IOLs. There was no difference between the long-term PCO rates when 1- and 3-piece acrylic hydrophobic IOLs were compared or when IOLs made of the same material but with different haptic angles were compared.
  
  
  CONCLUSIONS
  In this study, eyes with acrylic hydrophilic IOLs were more likely to develop PCO than those with acrylic hydrophobic IOLs. The lens design (1-piece versus 3-piece and varying haptic angles) did not affect the PCO rate.
authors.affiliation: Department of Ophthalmology, Ankara Oncology Hospital, Ankara 06200, Turkey.
authors.forename: Rahmi
authors.initials: R
authors.lastname: Duman
authors.affiliation: Department of Ophthalmology, Dünya Göz Hospital Group, Ankara 06680, Turkey.
authors.forename: Fatih
authors.initials: F
authors.lastname: Karel
authors.affiliation: Department of Ophthalmology, Ünye State Hospital, Ordu 52300, Turkey.
authors.forename: Pelin
authors.initials: P
authors.lastname: Özyol
authors.affiliation: Department of Biostatistics, Ankara University School of Medicine, Ankara 06100, Turkey.
authors.forename: Can
authors.initials: C
authors.lastname: Ateş
keywords: intraocular lens; neodymium: yttrium-aluminum-garnet capsulotomy; posterior capsule opacification