Journal List > J Korean Ophthalmol Soc > v.53(3) > 1009303

Ahn, Lee, Lee, and Choi: Clinical Outcomes of Advanced Surface Ablation with Smoothing in High Myopia

Abstract

Purpose

To investigate the results of Advanced Surface Ablation (ASA) coupled with "smoothing" to smooth the ablation surface after covering masking fluid.

Methods

ASA was performed in 61 eyes with ablation depth of more than 75 µm. The mean refractive error was -5.88 ± 1.27 D and mean ablation depth was 102.93 ± 12.06 µm. Smoothing was performed in all patients (mean depth 16.79 ± 2.43 µm, mean diameter 8.77 ± 0.16 mm). Customized Aspheric Transition zone (CATz) was used in the laser algorithm.

Results

The mean refractive error was -0.29 ± 0.41 D at postoperative 6 months and 97% of patients had an UCVA of 1.0 or better at postoperative 6 months. There was no statistically significant difference in magnitude of high-order aberrations at postoperative 6 months. The magnitude of total spherical aberrations increase was 0.084 µm at postoperative 6 months (p<0.05, paired t-test). The cornea was maintained clear in the majority of eyes.

Conclusions

Excellent results were obtained by ASA coupled with "smoothing" in high myopia patients with an ablation depth greater than 75 µm.

Figures and Tables

Figure 1
Distribution of uncorrected visual acuity after advanced surface ablation with smoothing over time.
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Figure 2
Mean spherical equivalent following advanced surface ablation with smoothing at different follow-up periods.
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Figure 3
Distribution of eyes in a given range of emmetropia after advanced surface ablation with smoothing.
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Figure 4
Changes in total high order aberration and total spherical aberration during postoperative 6 months. *p < 0.05 (paired t-test) compared with preoperative value.
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Figure 5
Patient's satisfaction after advanced surface ablation with smoothing.
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Table 1
Patient demographics according to ablation depth before advanced surface ablation with smoothing
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Values are presented as number or mean ± SD unless otherwise indicated.

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