97th DOG Annual Meeting 1999

K186

REFRACTIVE STABILITY AFTER LASER IN SITU KERATOMILEUSIS (LASIK) IN MYOPIA AND MYOPIC ASTIGMATISM WITH THE KERACOR 217 EXCIMER LASER

G. Wellermann, G. W. K. Steinkamp, E.-M. Schnitzler, C. Ohrloff

Introduction: For a possible retreatment after laser in situ keratomileusis (LASIK), stable refractive values are a prerequisite to receive good refractive results. Within the first four months following LASIK the corneal flap can be easily lifted. Purpose of this investigation was to define an optimal time frame in which LASIK retreatment can be performed.

Methods: In this prospective study LASIK was performed on ninety-one eyes of 56 patients aged 20 to 63 years with myopia and myopic astigmatism. The mean spherical equivalent was -7.01 diopters (D), ranging from -1.38 to -15.13 D. Surgery was performed with the Keracor 217 excimer laser using the PlanoScan software and the Hansatome microkeratome. Patients underwent examinations at 1 week, 1, 4 and 12 months postoperatively.

Results: One week after LASIK the mean spherical correction was +0.55 D, after 1,4, and 12 months +0.23 D, +0.20 D and +0.25 D, respectively.

Conclusion: The refraction after LASIK achieved stable results after 4 weeks. LASIK retreatement could be performed after this time.

Johann Wolfgang Goethe-University Frankfurt, Dept. of Ophthalmolgy, Theodor-Stern-Kai 7, D-60590 Frankfurt/Germany


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