title: Posterior capsule opacification and neodymium:YAG laser capsulotomy rates with 2 microincision intraocular lenses: Four-year results.
abstract: OBJECTIVE
  To compare the development of posterior capsule opacification (PCO) and neodymium:YAG (Nd:YAG) capsulotomy rates between 2 microincision intraocular lenses (IOLs) 4 years after surgery.
  
  
  METHODS
  Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.
  
  
  METHODS
  Prospective randomized clinical trial.
  
  
  METHODS
  Patients randomly received a Y-60H 3-piece hydrophobic IOL (hydrophobic group) in 1 eye and an MI60 1-piece hydrophilic IOL (hydrophilic group) in the contralateral eye during simultaneous bilateral cataract surgery. Eyes were examined 1 week, 20 months, and 4 years postoperatively. Digital retroilluminated images of each eye were evaluated using Automated Quantification of After-Cataract software. The Nd:YAG laser capsulotomy rate was recorded.
  
  
  RESULTS
  Sixty patients were enrolled. Objective PCO was significantly higher in the hydrophobic group than in the hydrophilic group before capsulotomy 2 years after cataract surgery (mean score 2.1 ± 1.8 (SD) versus 1.2 ± 1.4) (P =.031). At the 4-year follow-up, the hydrophobic group had a statistically significantly higher Nd:YAG rate than the hydrophilic group (77% versus 50%) (P =.012).
  
  
  CONCLUSIONS
  Comparison of 2 microincision IOLs indicated a statistically significant difference in PCO and Nd:YAG capsulotomy rates, with very high Nd:YAG rates 4 years after surgery.
authors.affiliation: From the Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.
authors.forename: Sabine M
authors.initials: SM
authors.lastname: Schriefl
authors.affiliation: From the Department of Ophthalmology, Medical University of Vienna, Vienna, Austria. Electronic address: rupert.menapace@meduniwien.ac.at.
authors.forename: Rupert
authors.initials: R
authors.lastname: Menapace
authors.affiliation: From the Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.
authors.forename: Eva
authors.initials: E
authors.lastname: Stifter
authors.affiliation: From the Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.
authors.forename: Daniela
authors.initials: D
authors.lastname: Zaruba
authors.affiliation: From the Department of Ophthalmology, Medical University of Vienna, Vienna, Austria.
authors.forename: Christina
authors.initials: C
authors.lastname: Leydolt
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D058442:Capsule Opacification / Q000453:epidemiology* / Q000473:pathology / Q000601:surgery; D005260:Female; D006801:Humans; D053844:Lasers, Solid-State; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification; D057852:Posterior Capsule of the Lens / Q000473:pathology* / Q000601:surgery; D064727:Posterior Capsulotomy / Q000706:statistics & numerical data*; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D014792:Visual Acuity / Q000502:physiology