title: Effect of keratometry on visual outcomes 1 month after hyperopic LASIK.
abstract: To determine whether preoperative, postoperative, or change in keratometry can be used to predict visual outcomes in hyperopic LASIK.
  
  
  
  A retrospective analysis was conducted on hyperopic eyes treated at Optical Express clinics. All eyes were targeted for emmetropia and treated using wavefront-guided LASIK (VISX S4, Abbott Medical Optics [AMO]), with flaps created using a femtosecond laser (IntraLase FS-60 [AMO]). A total of 1659 consecutive eyes of 895 patients met the study inclusion criteria: preoperative sphere > or = 1.00 diopter, complete 1-month follow-up data, and availability of pre- and postoperative keratometry measurements. Factors associated with 1-month visual results were evaluated with multivariate analysis.
  
  
  
  Preoperative sphere was strongly correlated with visual outcomes. Higher levels of correction were associated with a greater loss of best spectacle-corrected visual acuity (BSCVA), a lower percentage of eyes achieving 20/20 BSCVA, and a lower percentage of eyes achieving 20/20 uncorrected visual acuity. For a given level of preoperative sphere, however, no statistically significant correlation was observed between visual outcomes and either pre- or postoperative keratometry.
  
  
  
  Preoperative, calculated postoperative, or 1-month postoperative keratometry values do not correlate with visual acuity outcomes following hyperopic LASIK.
authors.affiliation: Optical Express, 5 Deerdykes Rd, Westfield, Cumbernauld G68 9HF, United Kingdom. jillyoung@opticalexpress.com
authors.forename: Jill J
authors.initials: JJ
authors.lastname: Young
authors.forename: Steven C
authors.initials: SC
authors.lastname: Schallhorn
authors.forename: Mitchell C
authors.initials: MC
authors.lastname: Brown
authors.forename: Keith A
authors.initials: KA
authors.lastname: Hettinger
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D003315:Cornea / Q000601:surgery*; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000601:surgery*; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies; D013524:Surgical Flaps; D016896:Treatment Outcome; D014792:Visual Acuity / Q000502:physiology*; D055815:Young Adult