May 2004
Volume 45, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2004
Correction of asymmetric and irregular corneal surfaces after preceding refractive surgery by means of corneal wavefront ablation: Presentation of two selected cases.
Author Affiliations & Notes
  • F. Fankhauser
    Ophthalmology, Staedtisches Klinikum, Dessau, Germany
  • J. Carstens
    Ophthalmology, Staedtisches Klinikum, Dessau, Germany
  • Footnotes
    Commercial Relationships  F. Fankhauser, Schwind eye tech solutions C; SIS C; J. Carstens, None.
  • Footnotes
    Support  none
Investigative Ophthalmology & Visual Science May 2004, Vol.45, 2856. doi:
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      F. Fankhauser, J. Carstens; Correction of asymmetric and irregular corneal surfaces after preceding refractive surgery by means of corneal wavefront ablation: Presentation of two selected cases. . Invest. Ophthalmol. Vis. Sci. 2004;45(13):2856.

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

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Abstract

Abstract: : Purpose: Decentred and irregular corneal surfaces after preceding refractive surgery lead to significant subjective disturbance and visual loss. Such surfaces can be treated successfully with excimer laser ablation based on corneal wavefront aberrometry. Methods: Two patients presented with highly irregular corneal topography after repetitive and complex refractive surgery at one eye. They showed regression with decentred ablation zone (after 10 D PRK) and irregular astigmatism (after LASIK, PTK, PRK, LKP and Phaco). Both patients were then treated by customized ablation (ESIRIS, ORK) based on corneal wavefront aberrometry (Keratron Scout). One patient underwent customized PRK, the other customized LASIK on the transplant (Amadeus). Results: After three customized PRK’s in one year the decentred ablation zone could be recentred and emmetropia with UCVA of 20/20 could be restored. The irregular astigmatism of the second patient could be reduced after customized LASIK and Re–LASIK as well as customized PRK on the flap with improvement of BCVA from 20/80 to 20/35. However, there was still some residual surface irregularity. Conclusions: Customized laser ablation based on corneal wavefront aberrometry seems to be an efficient tool for the correction of complex surface irregularities after refractive surgery. The system used in this presentation is able to perform corneal repair procedures as well as customized primary ablations. In complex cases residual irregular astigmatism may persist. However, improvement of visual acquity as well as decrease of disturbing subjective symptoms still can be achieved.

Keywords: cornea: clinical science • refractive surgery: other technologies • refractive surgery: corneal topography 
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