Correlation between pre–operative wavefront components and post–LASIK ametropia

Abstract

Abstract: : Purpose: Investigate correlations between pre–operative wavefront components (e.g. coma, spherical aberration) and post–operative overcorrection and undercorrection in eyes treated with conventional and wavefront driven myopic laser in–situ keratomileusis. Methods: Hartmann–Shack wavefront measurements were obtained pre–operatively and 1 to 3 months post–operatively in eyes undergoing both conventional and wavefront driven myopic LASIK. Results were analyzed to determine correlation between pre–operative levels of coma and spherical aberration and post–operative ametropia. Results: A correlation exists between the level of pre–operative spherical aberration and the post–operative ametropia: higher amounts of pre–operative spherical aberration correlate with higher post–operative ametropia. The correlation was stronger in conventional treatments versus wavefront guided treatments. Conclusions: The amount of spherical aberration in a pre–operative wavefront measurement should enter into nomogram calculations for wavefront guided myopic LASIK treatments.

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