title: Phakic intraocular lens for the correction of hyperopia.
abstract: OBJECTIVE
  To evaluate surgical outcomes and adverse events associated with the correction of hyperopia with a phakic intraocular lens (pIOL).
  
  
  METHODS
  St. Erik Eye Hospital, Stockholm, Sweden.
  
  
  METHODS
  This prospective single-center cohort study comprised hyperopic eyes having implantation of the PRL pIOL and a 1-year follow-up. Follow-up included evaluation of the uncorrected (UCVA) and best corrected (BCVA) visual acuity, refraction, intraocular pressure (IOP), endothelial cell counts, and adverse events. The main outcome measures were efficacy, safety, predictability, stability, and changes in endothelial cell density and IOP.
  
  
  RESULTS
  Forty eyes of 25 patients (mean age 32 years; range 21 to 44 years) were evaluated. At 1 year, all eyes were within +/-1.00 diopter (D) of the attempted refraction and 35 eyes (87.5%) were within +/-1.00 D of emmetropia. The mean UCVA was 0.18 logMAR. Three eyes (7.5%) lost 2 lines of BCVA. The initial endothelial cell loss postoperatively was -4.6% (P< .01), which remained stable thereafter (P> .05). The mean IOP remained unchanged during the entire follow-up (P> .05). The most frequent complication was postoperative pupillary block in 7 eyes (17.5%). Two eyes with severe glare and 1 eye with unexpected myopia and discomfort had pIOL explantation. Exchange of the pIOL was performed in 2 eyes and laser-assisted subepithelial keratectomy in 1 eye to treat unexpected postoperative myopia. No pIOL-induced glaucoma or cataract developed.
  
  
  CONCLUSIONS
  Refractive stability and predictability were high at the 1-year follow-up. There was no gain in corrected visual acuity. Despite 2 iridotomies performed 2 weeks preoperatively, the main complication was early pupillary block.
authors.affiliation: St. Erik's Eye Hospital, Stockholm, Sweden. annemari.koivula@sankterik.se
authors.forename: Annemari
authors.initials: A
authors.lastname: Koivula
authors.forename: Charlotta
authors.initials: C
authors.lastname: Zetterström
mesh_terms: D000328:Adult; D002452:Cell Count; D004728:Endothelium, Corneal / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology / Q000601:surgery*; D007429:Intraocular Pressure / Q000502:physiology; D019654:Lens Implantation, Intraocular / Q000009:adverse effects / Q000379:methods*; D008297:Male; D054120:Phakic Intraocular Lenses; D011183:Postoperative Complications; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D016896:Treatment Outcome; D014792:Visual Acuity