Artikel
Why is it so difficult to treat astigmatism with excimer laser surface ablation?
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Veröffentlicht: | 18. Oktober 2013 |
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Gliederung
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Purpose: Up to 5 D of corneal astigmatism can be treated safely with excimer laser surface ablation following the KRC guidelines. Although results are usually very good, regression can occur in some cases.
Method: The results of excimer laser surface ablation for treatment of low myopia, high myopia and myopic astigmatism are compared. Emphasis is placed on the stability of the refraction after treatment.
Results: In general, excimer laser surface ablation is an excellent option for treatment of astigmatism. However, slight changes in the central anterior cornea can be observed after astigmatic correction.
Conclusion: The asymmetrical ablation of collagen lamellae in an astigmatic correction might induce a differential relaxation in the stromal lamellar tension, which can result in a diffuse anterior corneal steepening.