Artikel
Comparison between correction and induction of high-order aberrations after standard and wavefront-guided LASIK
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Autoren
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T. Hammer
- Department of ophthalmology, University Halle-Wittenberg
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M. Heynemann
- Department of ophthalmology, University Halle-Wittenberg
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I. Naumann
- Department of ophthalmology, University Halle-Wittenberg
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G. I. W. Duncker
- Department of ophthalmology, University Halle-Wittenberg
| Veröffentlicht: | 22. September 2004 |
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Gliederung
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Objective
Wavefront-guided LASIK-treatments should reduce high-order aberrations (HOA). But the microkeratome cut as well as the ablation itself induce HOA. Purpose of this study was to investigate the amount of corrected preoperative measured HOA and induction of new HOA.
Methods
25 myopic patients (2 to 7 diopter) were treated by standard and wavefront-guided LASIK. Pre- and postoperative measurements of total ocular aberrations, contrast sensitivity and visual acuity under dim light conditions were performed.
Results
Patients with preoperative increased aberrations of 3. and 4. order and myopia up to 5 diopter showed reduction of wavefront deformation. In cases of higher myopic corrections and lower preoperative spherical aberrations developed an increase of spherical aberrations. The changes of other HOA showed no correlation with the amount of corrected myopia. The comparison of postoperative contrast sensitivity between standard and wavefront-guided LASIK displayed a high variability.
Conclusions
If preoperative aberrations of 3. and 4. order were increased and the myopia is < 6 diopter- wavefront-guided LASIK can reduce total ocular HOA. Aberrometric findings after wavefront-guided LASIK in patients with lower preoperative HOA and higher myopia (> 6 diopter) are comparable with the results after standard treatment.
