title: Position of rigid and foldable iris-fixated myopic phakic intraocular lenses evaluated by Scheimpflug photography.
abstract: OBJECTIVE
  To evaluate the postoperative intraocular positional stability of 1 rigid poly(methyl methacrylate) (PMMA) phakic intraocular lens (pIOL) model and 2 foldable polysilicone-PMMA iris-fixated pIOL models.
  
  
  METHODS
  Department of Ophthalmology, Johann Wolfgang Goethe-University Frankfurt am Main, Germany.
  
  
  METHODS
  One of 3 iris-fixated pIOL models (Artisan, Artiflex I, and Artiflex II, Ophtec BV) was implanted in 45 eyes of 26 patients with myopia or myopic astigmatism. The central distance between the pIOL and corneal endothelium and between the pIOL and anterior surface of the crystalline lens was evaluated using Scheimpflug photography 6 and 12 months after surgery.
  
  
  RESULTS
  The mean preoperative spherical equivalent was -9.32 diopters +/- 1.78 (SD) (range -6.5 to -13.5 D). Each IOL model was implanted in 15 eyes. The median distance from the central corneal endothelium to the anterior surface of the pIOL at 6 months and 12 months was 2.65 mm and 2.64 mm, respectively, in the Artisan group, 2.47 mm and 2.50 mm, respectively, in the Artiflex I group, and 2.48 mm and 2.52 mm, respectively, in the Artiflex II group. The median distance between the posterior surface of the pIOL and the anterior surface of the crystalline lens at 6 months and 12 months was 0.40 mm and 0.48 mm, respectively, in the Artisan group, 0.53 mm and 0.55 mm, respectively, in the Artiflex I group, and 0.68 mm and 0.66 mm, respectively, in the Artiflex II group. At 12 months, the distance between the pIOL and crystalline lens was statistically significantly greater in the Artiflex II group than in the Artisan group (P<.01).
  
  
  CONCLUSIONS
  The intraocular position of rigid pIOLs and foldable silicone iris-supported pIOLs showed a difference between the 3 pIOL models in space to the crystalline lens and the corneal endothelium, which may affect long-term results in terms of IOL interaction with surrounding tissue.
authors.affiliation: Department of Ophthalmology, Johann Wolfgang Goethe-University, Frankfurt am Main, Germany. kohnen@em.uni-frankfurt.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Kohnen
authors.forename: Magda
authors.initials: M
authors.lastname: Cichocki
authors.forename: Michael J
authors.initials: MJ
authors.lastname: Koss
mesh_terms: D000328:Adult; D000869:Anterior Eye Segment / Q000473:pathology; D001251:Astigmatism / Q000601:surgery; D003941:Diagnostic Techniques, Ophthalmological; D005260:Female; D006801:Humans; D007498:Iris / Q000601:surgery*; D019654:Lens Implantation, Intraocular / Q000379:methods*; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D054120:Phakic Intraocular Lenses; D010781:Photography / Q000379:methods*; D019904:Polymethyl Methacrylate; D012189:Retrospective Studies; D012826:Silicone Elastomers; D013536:Suture Techniques
chemical_list: D012826:Silicone Elastomers; D019904:Polymethyl Methacrylate