title: Collagen copolymer toric posterior chamber phakic intraocular lenses to correct high myopic astigmatism.
abstract: OBJECTIVE
  To assess the safety, efficacy, stability, and predictability after implantation of a toric intraocular copolymer (Collamer) lens (pIOL) to correct high myopic astigmatism.
  
  
  METHODS
  Fernández-Vega Ophthalmological Institute, Oviedo, Spain.
  
  
  METHODS
  This study evaluated eyes that had implantation of a toric pIOL. Outcome measures were the uncorrected (UDVA) and corrected (CDVA) distance visual acuities (Snellen decimal), refraction, and postoperative complications.
  
  
  RESULTS
  The study included 15 eyes of 12 patients (9 women). Preoperatively, the mean manifest spherical refraction was -1.98 diopters (D) +/- 1.32 (SD) (range -0.50 to -5.50 D) and the mean refractive cylinder, -4.85 +/- 0.83 D (range -6.50 to -4.00 D). At 12 months, the mean refractive cylinder was -0.55 +/- 0.52 D (range -1.50 to 0.00 D), with 93.3% of eyes having less than 1.00 D of cylinder. The mean spherical equivalent was -0.31 +/- 0.42 (range -1.00 to 0.75 D), with more than 70% of eyes within +/-0.50 D of the target. For the astigmatic components, 93.3% of eyes were within +/-1.00 D of J0 (r(2) = 0.98) and all eyes were within +/-1.00 D of J45 (r(2) = 0.98). The mean UDVA was 0.70 +/- 0.20 and the mean CDVA, 0.83 +/- 0.12. The overall efficacy index was 0.90. Postoperatively, all eyes had unchanged CDVA or gained 1 or more lines.
  
  
  CONCLUSIONS
  The refractive outcomes and improvement in UDVA and CDVA were rapidly achieved and remained fairly consistent throughout the follow-up period, supporting the use of toric pIOLs in eyes with high astigmatism.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: Fernández-Vega Ophthalmological Institute, Surgery Department, School of Medicine, University of Oviedo, Spain. j.alfonso@fernandez-vega.com
authors.forename: José F
authors.initials: JF
authors.lastname: Alfonso
authors.forename: Begoña
authors.initials: B
authors.lastname: Baamonde
authors.forename: David
authors.initials: D
authors.lastname: Madrid-Costa
authors.forename: Paulo
authors.initials: P
authors.lastname: Fernandes
authors.forename: Jorge
authors.initials: J
authors.lastname: Jorge
authors.forename: Robert
authors.initials: R
authors.lastname: Montés-Micó
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000503:physiopathology / Q000601:surgery*; D003094:Collagen; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D054120:Phakic Intraocular Lenses; D011183:Postoperative Complications; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology
chemical_list: D003094:Collagen