title: Collagen copolymer posterior chamber phakic intraocular lens supported by the ciliary sulcus to treat myopia: one-year follow-up.
abstract: OBJECTIVE
  To evaluate the predictability, stability, safety, and efficacy of Visian V4b Implantable Collamer Lens phakic intraocular lens (pIOL) implantation to treat varying degrees of myopia.
  
  
  METHODS
  Fernández-Vega Ophthalmological Institute, Oviedo, Spain.
  
  
  METHODS
  Prospective nonrandomized clinical study.
  
  
  METHODS
  The uncorrected (UDVA) and corrected (CDVA) distance visual acuities, refraction, pIOL vault, and adverse effects were evaluated 12 months postoperatively.
  
  
  RESULTS
  The study enrolled 121 eyes (68 patients). The mean spherical equivalent decreased from -8.61 diopters (D) ± 3.41 (SD) (range -18.75 to -2.25 D) preoperatively to -0.18 ± 0.29 D (range -1.25 to 0.50 D) 12 months postoperatively; 97 eyes (80.2%) were within ±0.25 D of the target refraction and 114 eyes (94.2%) were within ±0.50 D (r(2) = 0.99). The mean Snellen decimal UDVA and CDVA were 0.91 ± 0.17 and 0.97 ± 0.09, respectively. Postoperatively, the UDVA was 20/20 or better in 80 eyes (66.1%) and 20/40 or better in 115 eyes (95.0%). The mean efficacy index was 0.96 ± 0.14. The CDVA was 20/20 or better in 103 eyes (85.1%) and 20/40 or better in all eyes. No eye lost lines of CDVA, and 22 eyes (18.2%) gained 1 or more lines of CDVA. The mean safety index was 1.04 ± 0.10. There were no intraoperative complications.
  
  
  CONCLUSIONS
  The predictability, safety, and effectiveness of the pIOL were good throughout the 12-month follow-up and comparable to outcomes reported for previous pIOL models.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From Fernández-Vega Ophthalmological Institute (Lisa, Alfonso, Alfonso-Bartolozzi, Fernández-Vega) and the Surgery Department (Alfonso, Fernández-Vega), School of Medicine, University of Oviedo, Oviedo, and the Optics Department (Pérez-Vives, Montés-Micó), Optometry Research Group, Faculty of Physics, University of Valencia, Valencia, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Lisa
authors.affiliation: From Fernández-Vega Ophthalmological Institute (Lisa, Alfonso, Alfonso-Bartolozzi, Fernández-Vega) and the Surgery Department (Alfonso, Fernández-Vega), School of Medicine, University of Oviedo, Oviedo, and the Optics Department (Pérez-Vives, Montés-Micó), Optometry Research Group, Faculty of Physics, University of Valencia, Valencia, Spain. Electronic address: j.alfonso@fernandez-vega.com.
authors.forename: José Fernando
authors.initials: JF
authors.lastname: Alfonso
authors.affiliation: From Fernández-Vega Ophthalmological Institute (Lisa, Alfonso, Alfonso-Bartolozzi, Fernández-Vega) and the Surgery Department (Alfonso, Fernández-Vega), School of Medicine, University of Oviedo, Oviedo, and the Optics Department (Pérez-Vives, Montés-Micó), Optometry Research Group, Faculty of Physics, University of Valencia, Valencia, Spain.
authors.forename: Belén
authors.initials: B
authors.lastname: Alfonso-Bartolozzi
authors.affiliation: From Fernández-Vega Ophthalmological Institute (Lisa, Alfonso, Alfonso-Bartolozzi, Fernández-Vega) and the Surgery Department (Alfonso, Fernández-Vega), School of Medicine, University of Oviedo, Oviedo, and the Optics Department (Pérez-Vives, Montés-Micó), Optometry Research Group, Faculty of Physics, University of Valencia, Valencia, Spain.
authors.forename: Luis
authors.initials: L
authors.lastname: Fernández-Vega
authors.affiliation: From Fernández-Vega Ophthalmological Institute (Lisa, Alfonso, Alfonso-Bartolozzi, Fernández-Vega) and the Surgery Department (Alfonso, Fernández-Vega), School of Medicine, University of Oviedo, Oviedo, and the Optics Department (Pérez-Vives, Montés-Micó), Optometry Research Group, Faculty of Physics, University of Valencia, Valencia, Spain.
authors.forename: Cari
authors.initials: C
authors.lastname: Pérez-Vives
authors.affiliation: From Fernández-Vega Ophthalmological Institute (Lisa, Alfonso, Alfonso-Bartolozzi, Fernández-Vega) and the Surgery Department (Alfonso, Fernández-Vega), School of Medicine, University of Oviedo, Oviedo, and the Optics Department (Pérez-Vives, Montés-Micó), Optometry Research Group, Faculty of Physics, University of Valencia, Valencia, Spain.
authors.forename: Robert
authors.initials: R
authors.lastname: Montés-Micó
mesh_terms: D000328:Adult; D001672:Biocompatible Materials; D002924:Ciliary Body / Q000601:surgery*; D003094:Collagen / Q000737:chemistry*; D005260:Female; D006801:Humans; D007431:Intraoperative Complications; D019654:Lens Implantation, Intraocular / Q000379:methods*; D008297:Male; D009216:Myopia / Q000601:surgery*; D054120:Phakic Intraocular Lenses; D011108:Polymers / Q000737:chemistry*; D011446:Prospective Studies; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult
chemical_list: D001672:Biocompatible Materials; D011108:Polymers; D003094:Collagen