April 2010
Volume 51, Issue 13
Free
ARVO Annual Meeting Abstract  |   April 2010
Post-Operative Astigmatism in Femtosecond Laser Enabled Keratoplasty: Effect of Radial Alignment Marks
Author Affiliations & Notes
  • M. J. Bradley
    Ophthalmology, Gavin Herbert Eye Institute, Irvine, California
  • N. Desai
    Ophthalmology, Gavin Herbert Eye Institute, Irvine, California
  • S. Garg
    Ophthalmology, Gavin Herbert Eye Institute, Irvine, California
  • M. Farid
    Ophthalmology, Gavin Herbert Eye Institute, Irvine, California
  • R. Gaster
    Ophthalmology, Gavin Herbert Eye Institute, Irvine, California
  • R. F. Steinert
    Ophthalmology, Gavin Herbert Eye Institute, Irvine, California
  • Footnotes
    Commercial Relationships  M.J. Bradley, None; N. Desai, None; S. Garg, None; M. Farid, None; R. Gaster, None; R.F. Steinert, Abbott Medical Optics, C.
  • Footnotes
    Support  None.
Investigative Ophthalmology & Visual Science April 2010, Vol.51, 1119. doi:https://doi.org/
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    • Get Citation

      M. J. Bradley, N. Desai, S. Garg, M. Farid, R. Gaster, R. F. Steinert; Post-Operative Astigmatism in Femtosecond Laser Enabled Keratoplasty: Effect of Radial Alignment Marks. Invest. Ophthalmol. Vis. Sci. 2010;51(13):1119. doi: https://doi.org/.

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

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Abstract
 
Purpose:
 

In femtosecond laser enabled keratoplasty (FLEK) a femtosecond laser is used to cut donor and host cornea in an interlocking pattern intended to promote precise anterior-posterior tissue alignment and increased wound stability. In addition, the laser can be programmed to create radial alignment marks on both donor and host to promote more even tissue distribution, suture length and radiality. We evaluate the effectiveness of these radial marks in reducing postoperative astigmatism.

 
Methods:
 

Retrospective comparison of 99 cases of FLEK with or without 12 radial alignment marks in donor and host cornea. All cases used a zig-zag incision. Postoperative astigmatism based on simulated keratometry and manifest refraction was compared at 1, 3, 6 and 9 months after surgery.

 
Results:
 

The mean postoperative astigmatism at 1, 3, 6 and 9 months is summarized in Table 1. There was no significant difference found in postoperative astigmatism comparing surgeries done with versus without radial alignment marks (all p values >0.17). Despite the surgeons' subjective sense during surgery that the radial marks assisted in achieving even tissue distribution, suture length and radiality, the data suggests no difference in outcome.

 
Conclusions:
 

Radial alignment marks may assist in achieving even tissue distribution, suture length and radiality in FLEK, but a retrospective analysis of cases performed with and without radial marks shows no difference in postoperative astigmatism.  

 
Keywords: transplantation • cornea: clinical science • laser 
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