title: Customized ablation for asymmetrical corneal astigmatism.
abstract: OBJECTIVE
  To evaluate laser in situ keratomileusis (LASIK) cases in which a customized ablation assisted by corneal topography was performed.
  
  
  METHODS
  Instituto de la Visión, Buenos Aires, Argentina.
  
  
  METHODS
  The study group comprised 23 cases with asymmetrical corneas; 17 had myopia and 6, hyperopia. Visual acuity, spherical equivalent (SE), and cylinder vectorial change measurements, along with keratometry and corneal topography, were performed in all cases preoperatively and postoperatively.
  
  
  RESULTS
  In the myopic cases, the mean preoperative SE was -4.92 diopters (D) +/- 2.46 (SD); it was -0.38 +/- 0.66 D after a mean follow-up of 4.41 +/- 2.32 months. In the hyperopic cases, the preoperative SE was +3.54 +/- 1.57 D; it was +0.33 +/- 0.50 D after a mean follow-up of 3.42 +/- 3.23 months. Cylinder vectorial change, visual acuity, and the number of visual acuity lines gained or lost were also evaluated in both groups.
  
  
  CONCLUSIONS
  Although some features of our algorithm for corneal-topography-assisted customized ablations should be modified, the results of our treatment of cases with asymmetrical astigmatism were encouraging.
authors.affiliation: Instituto de la Visión, Buenos Aires, Argentina.
authors.forename: C
authors.initials: C
authors.lastname: Argento
authors.forename: M J
authors.initials: MJ
authors.lastname: Cosentino
mesh_terms: D000328:Adult; D001251:Astigmatism / Q000601:surgery*; D003315:Cornea / Q000601:surgery*; D019781:Corneal Topography; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006956:Hyperopia / Q000601:surgery; D020731:Keratomileusis, Laser In Situ; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery; D012029:Refraction, Ocular; D013524:Surgical Flaps; D016896:Treatment Outcome; D014792:Visual Acuity