title: [Myopic implant of the posterior chamber using a flexible Collamer lens].
abstract: BACKGROUND
  The purpose of this study was to report results, effectiveness and safety of implanting a negative collagen/HEMA copolymer posterior chamber phakic intraocular lens in moderate to highly myopic eyes.
  
  
  METHODS
  23 eyes from 12 patients with a mean preoperative spherical equivalent refraction of - 10.94 +/- 5.97 D underwent a refractive procedure with the Staar ICL trade mark posterior chamber phakic intraocular lens. The average follow-up was 12.9 +/- 7.4 months (range 4 - 24 months). Preoperative and postoperative uncorrected and best corrected visual acuity, subjective refraction, intraocular pressure, keratometry, ICL trade mark centration and anterior subcapsular opacities were evaluated.
  
  
  RESULTS
  Postoperative uncorrected visual acuity improved in all eyes. The best corrected visual acuity increased from 0.82 +/- 0.39 preoperatively to 1.05 +/- 0.24 postoperatively. The gain in visual acuity was statistically significant (Student t-test, p = 0.0097). The mean postoperative spherical equivalent refraction was - 0.82 +/- 1.42 D (p < 0,0001). The mean postoperative intraocular pressure was 15.65 +/- 2.72 mm Hg. The intraocular contact lens remained well centred in all eyes and no anterior subcapsular opacities were observed. Three patients underwent transcient complication without affecting the visual outcome.
  
  
  CONCLUSIONS
  The use of a posterior chamber phakic intraocular lens in myopic eyes is a safe procedure to correct moderate to high myopia. Long-term results are still unknown.
authors.affiliation: Hôpital ophtalmique Jules Gonin, Lausanne, Suisse, France.
authors.forename: Sylvain
authors.initials: S
authors.lastname: Roy
authors.forename: Jean-Jacques
authors.initials: JJ
authors.lastname: Tritten
mesh_terms: D000328:Adult; D003094:Collagen; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D007431:Intraoperative Complications / Q000503:physiopathology; D007910:Lenses, Intraocular; D008297:Male; D008689:Methacrylates; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D011108:Polymers; D011474:Prosthesis Design; D012029:Refraction, Ocular
chemical_list: D008689:Methacrylates; D011108:Polymers; C005044:hydroxyethyl methacrylate; D003094:Collagen