Results of Wave-front Corrected LASIK Procedures

Gießler S., Hammer T., Duncker G. I. W.,
Martin-Luther-Universität, Klinik und Poliklinik für Augenheilkunde (Halle/Saale)

Aim: It is the first time, that laser ablations of the cornea according to the refractive characteristics of the patient´s eye are possible with the so called wavefront technology. Wavefront guided refractive corrections take into account even high order aberrations. We wanted to address our own results with this new device of refractive surgery.
Methods: We did wavefront corrected LASIK procedures in 50 patients using the Keracor 217 Z. The spherical equivalent ranged between -1.3 D and -10.5 D. The subjective refraction preoperatively was compared to the aberrometry values and the laser setting. Postoperative follow-up examinations with testing of the subjective and objective refraktion were performed after 1 week, 1 month and 3 months.
Results: The laser corrections were very exactly and reliably in the range from -1D to -6D. However from -5 D to -10 D we got considerable under- and overcorrectons.
Conclusions: In low range myopia very precise ablations are easily possible on the basis of subjective and aberrometry derived refraction data. Wavefront guide corrections of higher degree myopia remains somewhat unpredictable. Overcorrections and undercorrections are possible. The stabilization of the refractive effect takes much longer than in classical LASIK. It is important to generate a specific correction factor due to the individual surgeon and the specific operation conditions.

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