title: Femtosecond laser-assisted hyperopic laser in situ keratomileusis with tissue-saving ablation: analysis of 800 eyes.
abstract: OBJECTIVE
  To evaluate the results and complications of hyperopic laser in situ keratomileusis (LASIK) with a low-energy femtosecond laser and non-custom tissue-saving ablation profile.
  
  
  METHODS
  Private practice, Siena, Italy.
  
  
  METHODS
  Case series.
  
  
  METHODS
  Hyperopic eyes with a spherical equivalent (SE) between +1.0 and +6.5 diopters (D) had LASIK. The flap (nominal thickness 110 μm) was created with a Ziemer LDV Z2 femtosecond laser and the refractive ablation performed with a Technolas 217P excimer laser in tissue-saving mode.
  
  
  RESULTS
  Eight hundred eyes of 413 patients were treated. The mean preoperative values were SE, +3.41 D ± 1.16 (SD); defocus equivalent, 4.20 ± 1.33; corrected distance visual acuity (CDVA), 0.07 ± 0.08 logMAR. At 9 months, the mean SE was -0.06 ± 0.26 D and the mean defocus equivalent 0.68 ± 0.62 (both P<.05). The defocus equivalent was 0.50 D or less in 594 eyes (74.3%) and 1.00 D or less in 707 eyes (88.4%). The mean CDVA was 0.07 ± 0.06 logMAR; 3 eyes (0.4%) lost 2 lines of CDVA and 58 eyes (7.3%) lost 1 line. The mean uncorrected distance visual acuity was 0.16 ± 0.13 logMAR. The safety index was 1.0 and the efficacy index, 0.8. The mean root-mean-square induced primary spherical aberration was 0.65 μm and the mean induced primary coma, 0.24 μm (both P<.05).
  
  
  CONCLUSIONS
  The low incidence of femtosecond-related complications was associated with good predictability, safety, and a low retreatment rate. The mean flap was 7 μm thicker than expected.
  
  
  BACKGROUND
  The author has no financial or proprietary interest in any material or method mentioned.
authors.affiliation: From Siena Eye Laser, Siena, Italy, and the School of Biomedical Sciences, University of Ulster, Coleraine, United Kingdom. Electronic address: leccisotti@libero.it.
authors.forename: Antonio
authors.initials: A
authors.lastname: Leccisotti
mesh_terms: D000328:Adult; D003315:Cornea / Q000503:physiopathology / Q000601:surgery*; D063171:Corneal Pachymetry; D019781:Corneal Topography; D005260:Female; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology / Q000601:surgery*; D007429:Intraocular Pressure; D007431:Intraoperative Complications; D020731:Keratomileusis, Laser In Situ / Q000379:methods*; D054018:Lasers, Excimer / Q000627:therapeutic use*; D008297:Male; D011183:Postoperative Complications; D011446:Prospective Studies; D012086:Reoperation; D013524:Surgical Flaps; D014065:Tonometry, Ocular; D014792:Visual Acuity / Q000502:physiology