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First clinical results with a new 200 kHz femtosecond laser system
  1. Christoph Winkler von Mohrenfels1,
  2. Ramin Khoramnia1,
  3. Josefina Salgado2,
  4. Christian Wüllner3,
  5. Christof Donitzky3,
  6. Mathias Maier1,
  7. Chris P Lohmann1
  1. 1Augenklinik Klinikum rechts der Isar, Technische Universität München, Munich, Germany
  2. 2Augenklinik, Julius-Maximilians-Universität, Würzburg, Germany
  3. 3WaveLight GmbH, Erlangen, Germany
  1. Correspondence to Dr Christoph Winkler von Mohrenfels, Technische Universität München, Ismaningerstrasse 22, Munich 81675, Germany; christoph.wvm{at}


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.

Clinical trials registration DE/CA126/AP4/3332/27/09. Bfam registration 09/03/2009, DE/CA126.

  • Cornea
  • excimer laser
  • femtosecond laser
  • flap creation

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  • Competing interests CWvM, RK, JS, MM and CPL none. CW and CD are employees of WaveLight GmbH, Erlangen, Germany.

  • Patient consent Obtained.

  • Ethics approval Ethics approval was obtained from the local ethics board.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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