title: Prevalence of cataract after collagen copolymer phakic intraocular lens implantation for myopia, hyperopia, and astigmatism.
abstract: OBJECTIVE
  To evaluate the prevalence of cataract after Implantable Collamer Lens phakic intraocular lens (pIOL) implantation with different models at different ages and for different refractive powers.
  
  
  METHODS
  Fernández-Vega Ophthalmological Institute, Oviedo, Spain.
  
  
  METHODS
  Retrospective nonrandomized clinical study.
  
  
  METHODS
  The pIOL (models V4, V4b, or V4c) was implanted in all cases.
  
  
  RESULTS
  The study included 3420 eyes (1898 patients). The mean patient age at surgery was 31.2 years ± 6.4 (SD) (range 18 to 50 years) and the mean spherical refractive error, -7.27 ± 5.24 diopters (D) (range -26.5 to 12.5 D). Twenty-one eyes (0.61%) of 15 patients had pIOL explantation (all model V4) because cataract developed. The mean age of the patients who had explantation was 39.43 ± 4.57 years; 7 were younger than 40 years, and 8 were 40 years or older. The mean spherical equivalent was -10.1 ± 5.41 D; 3 eyes had a pIOL power less than -10.50 D, 4 eyes between -10.50 D and -13.50 D, and 14 higher than -13.50 D. The mean time between pIOL implantation and cataract surgery was 4.2 ± 1.8 years. No eye with implantation of the latest models (V4b and V4c) developed cataract. The mean vault distance in eyes that developed cataracts was 103 ± 69 μm.
  
  
  CONCLUSIONS
  The incidence of cataract was low after pIOL implantation at the 6-year follow-up. The rate of cataract was higher in older patients and in those with high refractive errors.
  
  
  BACKGROUND
  No author has a financial or proprietary interest in any material or method mentioned.
authors.affiliation: From the Fernández-Vega Ophthalmological Institute (Alfonso, Fernández-Vega) and the Surgery Department (Alfonso, Lisa, Fernández-Vega, Almanzar), 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 F
authors.initials: JF
authors.lastname: Alfonso
authors.affiliation: From the Fernández-Vega Ophthalmological Institute (Alfonso, Fernández-Vega) and the Surgery Department (Alfonso, Lisa, Fernández-Vega, Almanzar), 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 the Fernández-Vega Ophthalmological Institute (Alfonso, Fernández-Vega) and the Surgery Department (Alfonso, Lisa, Fernández-Vega, Almanzar), 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 the Fernández-Vega Ophthalmological Institute (Alfonso, Fernández-Vega) and the Surgery Department (Alfonso, Lisa, Fernández-Vega, Almanzar), 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: Dagoberto
authors.initials: D
authors.lastname: Almanzar
authors.affiliation: From the Fernández-Vega Ophthalmological Institute (Alfonso, Fernández-Vega) and the Surgery Department (Alfonso, Lisa, Fernández-Vega, Almanzar), 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 the Fernández-Vega Ophthalmological Institute (Alfonso, Fernández-Vega) and the Surgery Department (Alfonso, Lisa, Fernández-Vega, Almanzar), 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: D000293:Adolescent; D000328:Adult; D001251:Astigmatism / Q000503:physiopathology / Q000601:surgery*; D002386:Cataract / Q000453:epidemiology* / Q000209:etiology; D003094:Collagen; D020878:Device Removal; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology / Q000601:surgery*; D019654:Lens Implantation, Intraocular; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D054120:Phakic Intraocular Lenses / Q000009:adverse effects*; D011108:Polymers; D015995:Prevalence; D012189:Retrospective Studies; D013030:Spain / Q000453:epidemiology; D014792:Visual Acuity / Q000502:physiology
chemical_list: D011108:Polymers; D003094:Collagen