Topography-guided treatment of irregular astigmatism with the WaveLight excimer laser

Topography-guided treatment of irregular astigmatism with the WaveLight excimer laser

Author Jankov, Mirko R. Google Scholar
Panagopoulou, Sophia I. Google Scholar
Tsiklis, Nikolaus S. Google Scholar
Hajitanasis, Georgos C. Google Scholar
Aslanides, Ioannis M. Google Scholar
Pallikaris, Ioannis G. Google Scholar
Institution Univ Crete
Universidade Federal de São Paulo (UNIFESP)
Abstract PURPOSE: To evaluate the feasibility, safety, and predictability of correcting high irregular astigmatism symptomatic eyes with the use of topography-guided photoablation.METHODS: In a prospective, non-comparative case series, 16 consecutive symptomatic eyes of 11 patients with small hyperopic and myopic excimer laser optical zones, decentered and irregular ablation after corneal graft, and corneal scars were operated. Uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), manifest and cycloplegic refraction, and corneal topography, with asphericity and regularity, were analyzed. LASIK (n=10) and photorefractive keratectomy (n=6) were performed using the ALLEGRETTO WAVE excimer laser and T-CAT software (Topography-guided Customized Ablation Treatment; WaveLight Laser Technologie AG, Erlangen, Germany).RESULTS: In the LASIK group, UCVA improved from 0.81 +/- 0.68 logMAR (20/130) (range: 0.2 to 2.0) to 0.29 +/- 0.21 logMAR (20/39) (range: 0.1 to 0.7) at 6 months. In the PRK group, mean UCVA improved from 0.89 +/- 0.87 logMAR (20/157) (range: 0.1 to 2.0) to 0.42 +/- 0.35 logMAR (20/53) (range: 0.1 to 1.0) at 6 months. Best spectacle-corrected visual acuity did not change significantly in either group. One PRK patient lost one line of BSCVA. Refractive cylinder for the LASIK group improved from -2.53 +/- 1.71 diopters (D) (range: -0.75 to -5.75 D) to -1.28 +/- 0.99 D (range: 0 to -2.50 D) at 6 months. Refractive cylinder in the PRK group improved from -2.21 +/- 2.11 D (range: -0.25 to -5.50 D) to -1.10 +/- 0.42 D (range: -0.50 to -1.50 D). Index of surface irregularity showed a decrease from 60 +/- 12 (range: 46 to 89) to 50 +/- 9 (range: 32 to 63) at 6 months in the LASIK group whereas no significant change was noted in the PRK group. Subjective symptoms, such as glare, halos, ghost images, starbursts, and monocular diplopia, were not present postoperatively.CONCLUSIONS: Topography-guided LASIK and PRK resulted in a significant reduction of refractive cylinder and increase of UCVA, without a significant loss of BSCVA.
Language English
Date 2006-04-01
Published in Journal Of Refractive Surgery. Thorofare: Slack Inc, v. 22, n. 4, p. 335-344, 2006.
ISSN 1081-597X (Sherpa/Romeo, impact factor)
Publisher Slack Inc
Extent 335-344
Access rights Closed access
Type Article
Web of Science ID WOS:000237159300006

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