title: First clinical results with a new 200 kHz femtosecond laser system.
abstract: BACKGROUND
  The aim of this study was to perform the first femtosecond laser cuts with a new prototype femtosecond laser, in vivo and to evaluate its safety, stability and efficacy.
  
  
  METHODS
  A LASIK cut was performed with a prototype 200 kHz femtosecond laser in both eyes of nine patients and one eye of two patients (20 individual eyes in total). A complete ophthalmic examination was performed preoperatively and postoperatively at 1, 3, 6 and 12 months after the procedure.
  
  
  RESULTS
  In the pilot series of 20 eyes, flap creation was possible in each case. The mean preoperative manifest refractive spherical equivalent was À-4.22 D (SD ± 61.22 D). The postoperative spherical equivalent refraction was À-0.1 D (SD ± 60.26 D) at 1 month, À-0.22 D (SD ± 60.24 D) at 3 months and À-0.15 D (SD ± 60.16 D) 12 months after surgery.
  
  
  CONCLUSIONS
  Femto-LASIK with this new laser system showed high levels of safety, stability and efficacy without any enhancement.
  
  
  BACKGROUND
  http://www.dimdi.de. DE/CA126/AP4/3332/27/09. Bfam registration 09/03/2009, DE/CA126.
authors.affiliation: Augenklinik Klinikum rechts der Isar, Technische Universität München, Munich, Germany. christoph.wvm@gmail.com
authors.forename: Christoph
authors.initials: C
authors.lastname: Winkler von Mohrenfels
authors.forename: Ramin
authors.initials: R
authors.lastname: Khoramnia
authors.forename: Josefina
authors.initials: J
authors.lastname: Salgado
authors.forename: Christian
authors.initials: C
authors.lastname: Wüllner
authors.forename: Christof
authors.initials: C
authors.lastname: Donitzky
authors.forename: Mathias
authors.initials: M
authors.lastname: Maier
authors.forename: Chris P
authors.initials: CP
authors.lastname: Lohmann
mesh_terms: D000328:Adult; D003319:Corneal Stroma / Q000601:surgery*; D004869:Equipment Safety; D005260:Female; D006801:Humans; D020731:Keratomileusis, Laser In Situ / Q000295:instrumentation*; D054018:Lasers, Excimer; D008297:Male; D008875:Middle Aged; D009216:Myopia / Q000601:surgery*; D010865:Pilot Projects; D011446:Prospective Studies; D012029:Refraction, Ocular / Q000502:physiology; D013524:Surgical Flaps; D014792:Visual Acuity / Q000502:physiology; D055815:Young Adult