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DJ pettinelli, AI Miller, JJ Stein, A Kanellopoulos; Comparison of Pre- and Post-LASIK High Order Aberrations and Coma with the Wavelight ALLEGRETTO-WAVE Laser in Non Wavefront-Guided Procedures and Measured by the Wavelight ALLEGRETTO Aberrometer in 85 Consecutive Eyes . Invest. Ophthalmol. Vis. Sci. 2002;43(13):2040.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: To evaluate the amount of change in high order aberrations and coma following non wavefront-guided LASIK with the Wavelight ALLEGRETTO-WAVE laser. Methods: 85 consecutive eyes, underwent LASIK for myopia or myopic astigmatism with the Wavelight ALLEGRETTO-WAVE laser. This laser treats by a gaussian-profile flying-spot of 0.9mm, with 200Hz frequency and a 250Hz active eye-tracker. We evaluated the wavefront analysis pre- and post-operative with the Wavelight ALLEGRETTO aberrometer, and specifically the amount of high order aberrations and coma. We utilized the Amadeus (Allergan, CA) and the M2 (Moria, France) microkeratomes. Mean follow-up was 4 months (3-5) Results: Mean values: The mean pre-operative sphere was - 4.75 D (-1.00 to -12.50) and the cylinder -1.25 (-0.25 to -3.75) UCVA improved from 20/200 to 20/25. At 3 months 87% of the eyes were 20/20, 47% 20/15 and 32% 20/10. 100% of eye were within +/- 1D at 3 months. Wavefront analysis showed a postoperative increase in coma of only 25% (mean coma of 6% pre-op to 9% post-op). There was no statistical difference in coma-induction and the use of any of the two microkeratomes in this study. No complications were noted in this limited group. Conclusion: LASIK utilizing the Wavelight ALLEGRETTO-WAVE laser appears to be safe and effective in the correction of myopic astigmatism. Additionally it appears that the asphericity-preserving software of ablation used with this laser results in very little high order aberration and coma induction following LASIK, even in cases treated with non wavefront-guided ablations.
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