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

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Ahn, Lee, Lee, and Choi: Clinical Outcomes of Advanced Surface Ablation with Smoothing in High Myopia
Original Article
Journal of the Korean Ophthalmological Society

Journal of the Korean Ophthalmological Society 2012; 53(3): 365-371.

Published online: 15 March 2012

DOI: https://doi.org/10.3341/jkos.2012.53.3.365

Clinical Outcomes of Advanced Surface Ablation with Smoothing in High Myopia

Ki Su Ahn, MD1, Seung Wuk Lee, MD2, Gi Heon Lee, MD1, Bong Joon Choi, MD, PhD1

1Lee Eye Clinic, Busan, Korea.

2Department of Ophthalmology, Kosin University College of Medicine, Busan, Korea.

Address reprint requests to Bong Joon Choi, MD, PhD. Lee Eye Clinic, #1129 Jungang-daero, Yeonje-gu, Busan 611-831, Korea. Tel: 82-51-866-7592, Fax: 82-51-866-7595, eyebong1@hanmail.net

Received 10 December 2010       Accepted 13 February 2012

Copyright © 2012 The Korean Ophthalmological Society

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.

Keywords: Advanced surface ablation (ASA), Customized Aspheric Transition zone (CATz), High myopia, Smoothing

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.
jkos-53-365-g004
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
jkos-53-365-i001

Values are presented as number or mean ± SD unless otherwise indicated.

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