title: Outcomes of the Acrysof ReSTOR IOL in myopes, emmetropes, and hyperopes.
abstract: OBJECTIVE
  To evaluate the influence of preoperative ocular parameters on various parameters of postoperative outcome after implantation of the AcrySof ReSTOR intraocular lens (IOL) in myopic, hyperopic, and emmetropic patients.
  
  
  METHODS
  Phacoemulsification and IOL implantation was performed in 56 eyes of 32 patients. According to axial length, 28 eyes were classified as emmetropic, 16 as myopic, and 12 as hyperopic. Patients were examined after 8.2+/-1.8 months (range: 5.7 to 10.5 months) for uncorrected and best distance-corrected visual acuity for far, intermediate, and near vision. A defocus profile was recorded and individual reading distance and distance for lowest intermediate visual acuity were determined. The predictability of three different calculation formulas was evaluated. Patients were interviewed for photic phenomena, quality of night vision, spectacle independence, and satisfaction with visual outcome.
  
  
  RESULTS
  Predictability of IOL calculation was not statistically significant among groups using the SRK-T formula, but was significantly different with the Haigis (P=.01) or Holladay I (P=.02) formulas. Uncorrected and best distance-corrected visual acuity for near, intermediate, and far vision were not significantly different among groups. Mean uncorrected far visual acuity was 20/23+/-5.5 letters, 20/25+/-6 letters, and 20/25+/-4.5 letters and uncorrected near visual acuity was 20/25+/-5.5 letters, 20/26+/-4.5 letters, and 20/26+/-7.5 letters for the emmetropic, myopic, and hyperopic groups, respectively. The defocus profile significantly varied among groups; patients of the hyperopic group showed a closer reading distance (29.5 cm) than patients of the emmetropic (32.8 cm) and myopic (34.6 cm) groups. Reading distance was statistically significantly correlated to axial length and anterior chamber depth and thus can be estimated preoperatively.
  
  
  CONCLUSIONS
  Our data show that preoperative refractive status is a relevant factor influencing postoperative outcome after implantation of a ReSTOR IOL. Predictability of IOL calculation and defocus profile were significantly different for myopic, emmetropic, and hyperopic patients.
authors.affiliation: University Eye Centre, Eberhard-Karls University, Tuebingen, Germany. Katrin.Petermeier@med.uni-tuebingen.de
authors.forename: Katrin
authors.initials: K
authors.lastname: Petermeier
authors.forename: Andre
authors.initials: A
authors.lastname: Messias
authors.forename: Florian
authors.initials: F
authors.lastname: Gekeler
authors.forename: Martin S
authors.initials: MS
authors.lastname: Spitzer
authors.forename: Peter
authors.initials: P
authors.lastname: Szurman
mesh_terms: D000180:Acrylic Resins; D000328:Adult; D000368:Aged; D005500:Follow-Up Studies; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology / Q000601:surgery*; D019654:Lens Implantation, Intraocular; D007910:Lenses, Intraocular; D008875:Middle Aged; D009216:Myopia / Q000503:physiopathology / Q000601:surgery*; D017060:Patient Satisfaction; D018918:Phacoemulsification; D011446:Prospective Studies; D019591:Pseudophakia / Q000503:physiopathology*; D012029:Refraction, Ocular / Q000502:physiology; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology
chemical_list: D000180:Acrylic Resins