title: Positioning of the posterior intraocular lens in the longer term following cataract surgery in eyes with and without pseudoexfoliation syndrome.
abstract: OBJECTIVE
  To assess long-term positioning of posterior chamber intraocular lenses within the capsular bag in eyes with pseudoexfoliation syndrome.
  
  
  METHODS
  The study includes 44 patients with pseudoexfoliation syndrome and 85 age-matched controls, who underwent cataract surgery in 2001 and 2002 at the Eye Department, Oslo University Hospital. In 2008, all patients were re-examined. A comparison of the extent of possible decentration in eyes with and without pseudoexfoliation syndrome was made by evaluating Scheimpflug images (Pentacam) of the anterior segment.
  
  
  RESULTS
  It was found that, 6-7 years following cataract surgery, posterior chamber intraocular lenses were positioned lower in eyes with pseudoexfoliation syndrome than in control eyes. The difference was statistically significant (p=0.01). Downward shift was associated with presence of glaucoma only in eyes with pseudoexfoliation syndrome (p=0.01). No patients had visual disturbances related to displacement of the intraocular lens. Three of the patients with pseudoexfoliation syndrome (6.8%) had observable pseudophacodonesis by slit-lamp examination, compared to one in the control group (1.2%). The study demonstrated that Pentacam is an appropriate instrument to measure decentration of intraocular lenses.
  
  
  CONCLUSIONS
  The study suggests that, 6-7 years after cataract surgery, the intraocular lenses within the capsular bag are more prone to decentration in pseudoexfoliation syndrome eyes, compared to controls.
authors.affiliation: Department of Ophthalmology, Oslo University Hospital, NorwayDepartment of Ophthalmology, Oslo University Hospital and University of Oslo, Norway.
authors.forename: Atle Einar
authors.initials: AE
authors.lastname: Ostern
authors.forename: Gunhild Falleth
authors.initials: GF
authors.lastname: Sandvik
authors.forename: Liv
authors.initials: L
authors.lastname: Drolsum
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D002386:Cataract / Q000150:complications*; D017889:Exfoliation Syndrome / Q000150:complications / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D008297:Male; D009664:Norway / Q000453:epidemiology; D018918:Phacoemulsification; D057972:Posterior Eye Segment / Q000601:surgery*; D011183:Postoperative Complications / Q000453:epidemiology / Q000517:prevention & control; D011474:Prosthesis Design; D012189:Retrospective Studies; D013997:Time Factors; D014792:Visual Acuity
keywords: cataract surgery; decentration; glaucoma; late in-the-bag IOL dislocation; posterior chamber intraocular lenses; pseudoexfoliation syndrome