title: Late dislocation of scleral-sutured posterior chamber intraocular lenses.
abstract: OBJECTIVE
  To examine a recent series of late scleral-sutured posterior chamber intraocular lens (PCIOL) dislocations to identify possible causes and preventive measures.
  
  
  METHODS
  Price Vision Group, Indianapolis, Indiana, USA.
  
  
  METHODS
  In this retrospective non-comparative interventional case series, 5 consecutive patients received treatment for dislocated scleral-sutured PCIOLs between July 2002 and March 2004. Dislocated lenses were resutured or replaced with another scleral-sutured PCIOL.
  
  
  RESULTS
  Dislocation of scleral-sutured PCIOLs occurred 7 to 14 years after implantation. Four dislocations were spontaneous, and 1 was precipitated by trauma. In each case, the suture affixing 1 or both haptics failed. There was no evidence that the suture had eroded through the tissue or that the knot had untied. Microscopic analysis of an explanted IOL with remnants of the suture attached showed localized degradation and cracking of the polypropylene suture material where it had been embedded in the scleral tissue.
  
  
  CONCLUSIONS
  Suture-fixated PCIOLs can dislocate due to degradation of the suture material over time. The use of larger diameter (9-0 instead of 10-0) polypropylene suture material and placement of the haptic and sutures in the ciliary sulcus to promote attachment of scar tissue may enhance the long-term stability of scleral-fixated PCIOLs.
authors.affiliation: Cornea Research Foundation of America , Indianapolis, Indiana, USA.
authors.forename: Marianne O
authors.initials: MO
authors.lastname: Price
authors.forename: Francis W
authors.initials: FW
authors.lastname: Price
authors.forename: Liliana
authors.initials: L
authors.lastname: Werner
authors.forename: Cecil
authors.initials: C
authors.lastname: Berlie
authors.forename: Nick
authors.initials: N
authors.lastname: Mamalis
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005548:Foreign-Body Migration / Q000209:etiology* / Q000517:prevention & control; D006801:Humans; D019654:Lens Implantation, Intraocular / Q000379:methods*; D007910:Lenses, Intraocular; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D012086:Reoperation; D012189:Retrospective Studies; D012590:Sclera / Q000601:surgery*; D013536:Suture Techniques; D013537:Sutures