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Increased higher-order optical aberrations after laser refractive surgery: A problem of subclinical decentration
Abstract
PURPOSE: To study the clinical and theoretical effects of subclinical decentrations on the optical performance of the eye after photorefractive laser surgery. SETTING: Department of Ophthalmology, University of Dresden, Dresden, Germany. METHODS: Ocular aberrations were determined before and 1 month after uneventful photorefractive keratectomy (PRK) with the Multiscan laser (Schwind) in 10 eyes of 8 patients. The corrections ranged from -2.5 to -6.0 diopters, and ablation zones of 6.0 mm and larger were used. The measured wavefront errors were compared to numerical simulations using the individually determined decentrations and currently used ablation profiles. RESULTS: The PRK-induced aberrations were significantly greater than the preoperative aberrations. The numerically calculated increase in the higher-order optical aberrations correlated with the clinical results, demonstrating a major increase in coma- and spherical-like aberrations. Subclinical decentration (less than 1.0 mm) was found to be a major factor in increased coma-like and spherical-like aberrations after corneal laser surgery. CONCLUSION: To minimize higher-order optical errors, special efforts to center the ablation zone are necessary; for example, by eye-tracking systems that consider the visual axis.
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Cited by
LASIK and PRK in hyperopic astigmatic eyes: is early retreatment advisable?
Frings, A., Richard, G., Steinberg, J., Linke, S., Katz, T., & Druchkiv, V. (2016) · Clinical Ophthalmology · doi:10.2147/opth.s99098 · Cited by 29
Metadata
- Authors
- Mrochen, M., Kaemmerer, M., Mierdel, P., & Seiler, T.
- Venue
- Journal of Cataract and Refractive Surgery
- Published
- 2001-03
- Volume
- 27
- Issue
- 3
- Pages
- 362-369
- ISSN
- 0146-2776 (ISSN-L)
- 0886-3350
- OpenAlex
- W142203701
- Cited by
- 280
- References
- 0
- FWCI
- 13.46
- Type
- journal article
- Language
- en
- Open access
- closed
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