[Results of wavefront-guided LASIK].
BACKGROUND
Wavefront-guided LASIK procedures provide patients with customized corneal treatments. The computer ablation profiles correct both spherical and/or cylindrical errors of refraction and aberrations up to the fifth order.


METHODS
We performed wavefront-guided LASIK treatments on 62 patients using the Keracor 217 Z. The spherical equivalent was -6.11 +/-2.29 D on the average. Data collected for 3 months were evaluated to determine the predictability, efficacy, stability, and safety of the refractive procedure.


RESULTS
We found good predictability of the refractive result after correcting -1 to -6 D of myopia. Beyond -7 D there were over- and undercorrections of +/-2 D in 10% of the procedures. A UCVA of 0.8 or better was observed in 53% of the patients 3 months postoperatively, and 75% of the patients reached a BCVA of 0.8 or better. After 3 months 6% lost 2 lines, 22% lost 1 line, 22% of the patients gained 1-2 lines, and BCVA remained unchanged in 55%. The fluctuation of the refraction was about -0.23 D during the first 3 postoperative months.


CONCLUSIONS
The low and middle range of myopia can be corrected very accurately using the wavefront technology. Higher degrees of myopia face both under- and overcorrections. Postoperative refractions become stable very quickly. However, the visual acuity changes even 6 months postoperatively. From our point of view, wavefront correction by LASIK should be more reliable in terms of centration, accuracy, and standardization to get better results.
Universitätsklinik und Poliklinik für Augenheilkunde, Martin-Luther-Universität Halle-Wittenberg, Halle.
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Hammer
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Duncker
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Giessler
D006801:Humans; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D020731:Keratomileusis, Laser In Situ / Q000379:methods* / Q000592:standards*; D012029:Refraction, Ocular; D012030:Refractive Errors / Q000175:diagnosis*; D054140:Refractive Surgical Procedures; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome; D014792:Visual Acuity