R 578
Astigmatism lamellating keratotomy with corneal topography analyse: 4 year experience and actual procedure
D. T. Pham, A. Bauer, K. Nordwald, N. Anders
Background: Corneal astigmatism can be corrected effectively by lamellating keratotomy (LK). Because of moving the lamellated cut in direction to the center of the cornea, the keratotomy with 90 to 100 % of corneal depth as T-Incision is not necessary. Therefore important advantages could be achieved: the mechanical and refractive stability. However, the refractive effect had a high standard deviation (SD), so that the procedure has to be improved.
Patients and method: We analyse the long-term results of the LK. The individual parameter of comeal astigmatism should be investigated by the corneal topography.
Results: Longitudinale examination following LK with 3 mm chordal length and 7 mm OZ showed a stable correcting effect of 3.9 D over 3 years. Analyses of corneal topography of astigmatism up to 6 D of 500 eyes indicated a significant correlation of astigmatism amount and the topography of the stepped meridian in the 3 mm, 3 - 5 mm and 5- 7 mm zone. However, 14 -38 % of the patients had no correlation of those parameter.
Conclusions: More reliability of the LK could be obtained by considering of corneal topography. One year results of the actual procedure will be presented.
Augenklinik, Krankenhaus Neukölln, Rudower Str. 48, D-12313 Berlin, *Augenklinik im Klinikum Virchow / Charité, Augustenburger Platz 35, D -13353 Berlin