title: Alcon LADARWave customcornea retreatments.
abstract: OBJECTIVE
  To present our experience performing wavefront-guided ablations for the treatment of residual refractive error following previous refractive surgery.
  
  
  METHODS
  Four different cases are presented-1) primary wavefront-guided LASIK; 2) wavefront-guided lift-flap LASIK retreatment; 3) wavefront-guided photorefractive keratectomy (PRK) retreatment; and 4) wavefront-guided PRK over radial keratotomy retreatment. All procedures were performed with the Alcon CustomCornea laser platform. Uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), manifest refraction, and wavefront analysis (6.5-mm pupil) were performed preoperatively and 3 months after CustomCornea retreatment. The Alcon LADARWave device was used for wavefront measurements.
  
  
  RESULTS
  Total lower order and higher order aberrations were decreased following wavefront-guided retreatment, resulting in improved quality of vision. The maximum target offset (+ 0.75 diopters) can be used to prevent an overcorrection of defocus (myopia) when treating a significant amount of spherical aberration.
  
  
  CONCLUSIONS
  Wavefront-guided ablation was an effective treatment for residual lower and higher order aberrations following previous refractive surgery. Custom ablation treatment algorithms need to be developed specifically for retreatment procedures.
authors.affiliation: Durrie Vision, 5520 College Blvd, Ste 201, Overland Park, KS 66211, USA. ddurrie@durrievision.com
authors.forename: Daniel S
authors.initials: DS
authors.lastname: Durrie
authors.forename: Jason E
authors.initials: JE
authors.lastname: Stahl
authors.forename: Frank
authors.initials: F
authors.lastname: Schwendeman
mesh_terms: D000328:Adult; D003315:Cornea / Q000601:surgery*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000009:adverse effects / Q000295:instrumentation*; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D018903:Photorefractive Keratectomy / Q000009:adverse effects / Q000295:instrumentation*; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000503:physiopathology; D054140:Refractive Surgical Procedures; D012086:Reoperation