April 2011
Volume 52, Issue 14
ARVO Annual Meeting Abstract  |   April 2011
Optical Ray Tracing-Guided LASIK for Moderate to High Myopic Astigmatism
Author Affiliations & Notes
  • Michael C. Mrochen
    IROC, IROC, Zurich, Switzerland
  • Arthur Cummings
    Wellington Eye Clinic, Dublin, Ireland
  • Matthias Maus
    Sehkraft, Cologne, Germany
  • Theo Seiler
    IROC, IROC, Zurich, Switzerland
  • Footnotes
    Commercial Relationships  Michael C. Mrochen, Alcon, WaveLight (C, R), IROC (I, E), WaveLight, IROC (P); Arthur Cummings, Alcon, WaveLight (R); Matthias Maus, Alcon, WaveLight (R); Theo Seiler, Alcon, WaveLight (R)
  • Footnotes
    Support  WaveLight AG
Investigative Ophthalmology & Visual Science April 2011, Vol.52, 5755. doi:
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    • Get Citation

      Michael C. Mrochen, Arthur Cummings, Matthias Maus, Theo Seiler; Optical Ray Tracing-Guided LASIK for Moderate to High Myopic Astigmatism. Invest. Ophthalmol. Vis. Sci. 2011;52(14):5755.

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      © ARVO (1962-2015); The Authors (2016-present)

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Purpose: : This study assesses the efficacy, safety and predictability of a highly individualized LASIK ablation profile based on an optical ray tracing algorithm for the treatment of moderate to high myopic astigmatism.

Methods: : In this multicenter study, three centers enrolled 127 eyes (71 patients) with a manifest refraction sphere ranging from 0.5 to -10.25 D (mean -5.92±1.72 D), with astigmatism ranging from 0 to -4.5 D. The intended outcome was plano in most eyes, an overcorrection of 0.5 D in one eye and an overcorrection of 0.25 D in 2 eyes. Refractive outcomes were analyzed pre-operatively and at 1 day, 1 month and 3 months post-operatively.

Results: : At three months post-operatively, 15 eyes had been lost to follow-up and one eye was excluded from analysis because of an early retreatment. From the remaining 111, 93 (83.8%) had an uncorrected visual acuity of 20/20 or better. The mean manifest refraction spherical equivalent (MRSE) for all eyes was 0.03±0.30 D. In 97 of 111 eyes (87.4%), the MRSE was within ±0.5 D, and in 107 of 111 eyes, (96.4%) the MRSE was within ±1 D. No eye lost 2 or more lines in the best spectacle corrected visual acuity.

Conclusions: : The new algorithm, which uses optical ray tracing to calculate highly individualized ablation profiles for LASIK treatment of moderate to high myopic astigmatism, is efficacious, safe and predictable.

Clinical Trial: : Swissmedic, BFARM, IMB, ray traing study

Keywords: refractive surgery: LASIK • refractive surgery: optical quality • refractive surgery: other technologies 

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