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Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
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Wavefront analysis after wavefront-guided myopic LASIK using a new generation aberrometer.

David Smadja, Tania De Castro, Laury Tellouck

    Journal of Refractive Surgery (Thorofare, N.J. : 1995)
    |September 25, 2014
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    Summary

    Wavefront-guided LASIK with a new aberrometer minimally increases higher-order aberrations (HOAs) after surgery for myopia. This effect is consistent regardless of correction level or initial aberration amounts.

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    Area of Science:

    • Ophthalmology
    • Refractive Surgery
    • Optical Engineering

    Background:

    • Laser-assisted in situ keratomileusis (LASIK) is a common refractive surgery.
    • Wavefront-guided LASIK aims to improve visual quality by correcting higher-order aberrations (HOAs).
    • Newer generation aberrometers offer enhanced precision in wavefront analysis.

    Purpose of the Study:

    • To assess short-term aberrometric outcomes of wavefront-guided LASIK for low to moderate myopia and myopic astigmatism.
    • To evaluate the induction of total HOAs, spherical aberrations, and coma using a new generation aberrometer.
    • To correlate induced aberrations with correction levels and preoperative aberration magnitudes.

    Main Methods:

    • Retrospective review of 92 eyes from 46 patients undergoing wavefront-guided LASIK.
    • Aberrometric analysis at a 6-mm pupil diameter, 3 months postoperatively.
    • Statistical analysis to determine significance and correlations of induced aberrations.

    Main Results:

    • A statistically significant but minimal increase in total HOAs, spherical aberrations (Z41), and coma (Z31) was observed.
    • Postoperative aberration changes showed weak correlation with achieved myopic correction.
    • Correlations with preoperative aberrations were also found to be poor to moderate.

    Conclusions:

    • Wavefront-guided LASIK utilizing a new Hartmann-Shack aberrometer results in minimal HOA induction.
    • The induction of HOAs is largely independent of the achieved correction level.
    • The procedure's impact on HOAs is also not significantly influenced by preoperative aberration magnitudes.