title: Cumulative neodymium:YAG laser rates after bag-in-the-lens and lens-in-the-bag intraocular lens implantation: comparative study.
abstract: OBJECTIVE
  To study the cumulative neodymium:YAG (Nd:YAG) laser rate after bag-in-the-lens implantation (Morcher 89A) and lens-in-the-bag implantation (Morcher 92S) of 2 intraocular lenses (IOLs) of the same biomaterial.
  
  
  METHODS
  Department of Ophthalmology, University Hospital of Antwerp, Edegem, Belgium.
  
  
  METHODS
  This study comprised 100 eyes of 87 patients who had the bag-in-the-lens IOL implantation between January 2000 and August 2004. The postoperative follow-up ranged between 17 and 72 months. One hundred eyes of 94 patients of the same age and with the same follow-up period received the lens-in-the-bag IOL. The cumulative Nd:YAG laser frequency rates in both groups were calculated, and the cumulative incidence rates were defined by Kaplan-Meier survival analysis.
  
  
  RESULTS
  No Nd:YAG laser capsulotomy was performed in eyes having bag-in-the-lens IOL implantation. A laser capsulotomy was performed in 20 eyes having lens-in-the-bag IOL implantation; the cumulative frequency in this group was 2% at 1 year and 20% at 71 months, with a plateau beginning at 42 months. The cumulative incidence rate of Nd:YAG posterior capsulotomy was approximately 2% at 1 year, increasing to approximately 28% at 42 months.
  
  
  CONCLUSIONS
  The cumulative Nd:YAG laser rate after bag-in-the-lens implantation was zero. A zero rate has not been reported with lens-in-the-bag implantation of an IOL of the same biomaterial or of other biomaterials, as published in the literature. Thus, it can be concluded that the bag-in-the-lens implantation technique has 100% effectiveness against posterior capsule opacification.
authors.affiliation: Department of Ophthalmology, University Hospital Antwerp, Edegem, Belgium.
authors.forename: Inge
authors.initials: I
authors.lastname: Leysen
authors.forename: Tanja
authors.initials: T
authors.lastname: Coeckelbergh
authors.forename: Laure
authors.initials: L
authors.lastname: Gobin
authors.forename: Helena
authors.initials: H
authors.lastname: Smet
authors.forename: Yves
authors.initials: Y
authors.lastname: Daniel
authors.forename: Veva
authors.initials: V
authors.lastname: De Groot
authors.forename: Marie-José
authors.initials: MJ
authors.lastname: Tassignon
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000209:etiology*; D005260:Female; D006801:Humans; D053685:Laser Therapy / Q000706:statistics & numerical data*; D007903:Lens Capsule, Crystalline / Q000473:pathology / Q000601:surgery*; D019654:Lens Implantation, Intraocular / Q000379:methods*; D008297:Male; D008875:Middle Aged; D018918:Phacoemulsification / Q000379:methods*; D011183:Postoperative Complications; D012189:Retrospective Studies