Einfluss der kornealen Biomechanik auf die Myopieregression nach Laser-in-situ-Keratomileusis
- 18 January 2013
- journal article
- research article
- Published by Springer Science and Business Media LLC in Der Ophthalmologe
- Vol. 110 (1), 41-47
- https://doi.org/10.1007/s00347-012-2633-9
Abstract
Laser in situ keratomileusis is a safe and accepted method for correcting myopia. The operational results in terms of accuracy as well as the subjective acceptance of patients for corrections to - 8 D are now considered to be promising (Seiler, Refraktive Chirurgie der Hornhaut, 2000); however, postoperative results show individual patient problems in long-term stability. It is believed that the preoperative condition of the cornea (e.g. thickness, biomechanical properties) could have an influence on postoperative problems such as myopic regression. This study included a total of 46 eyes from 25 patients. At 3 months postoperatively, 15 patients (19 eyes) showed a SEQ of -0.50 D or more. Within this group, 11 patients (15 eyes) developed a regression (regression group) within the first 3 postoperative months. The remainder of the total group did not show any regression (stability group). The subjects of this study were on average 33 ± 8 years (stability group) and 31 ± 7 years old (regression group). The corneal thickness was tested and refractive error, visual acuity (BCVA/UCVA) and intraocular pressure was measured. In addition, the corneal hysteresis (CH) and corneal resistance factor (CRF) were determined. The mean preoperative spherical equivalent refraction was -3.14 D ± 1.41 D (SE) in the stability group and - 6.47 D ± 1.40 D (p = 0.001)in the regression group. Also, the postoperative spherical equivalents were statistically significant different (p < 0.05). In contrast, the mean preoperative corneal thickness showed no differences in both groups (p = 0.96) (stability group 563 ± 36 µm and regression group 563 ± 28 µm). The aim of the study to detect a possible causal relationship between myopia regression after LASIK and the biomechanical properties of the cornea and corneal thickness could not be clearly identified.Keywords
This publication has 27 references indexed in Scilit:
- Corneal biomechanical properties measured with the Ocular Response Analyser in a myopic populationOphthalmic and Physiological Optics, 2011
- A Clinical Description of Ocular Response Analyzer MeasurementsInvestigative Ophthalmology & Visual Science, 2011
- Differences in the early biomechanical effects of hyperopic and myopic laser in situ keratomileusisJournal of Cataract & Refractive Surgery, 2010
- Changes in Ocular Response Analyzer Parameters After LASIKJournal of Refractive Surgery, 2010
- Biomechanical model of human cornea based on stromal microstructureJournal of Biomechanics, 2010
- Postoperative changes in intraocular pressure and corneal biomechanical metricsJournal of Cataract & Refractive Surgery, 2009
- Excimer laser correction of moderate to high astigmatism with a non-wavefront-guided aberration-free ablation profile: Six-month resultsJournal of Cataract & Refractive Surgery, 2009
- Corneal biomechanical measurements before and after laser in situ keratomileusisJournal of Cataract & Refractive Surgery, 2008
- Corneal biomechanical properties in normal, post-laser in situ keratomileusis, and keratoconic eyesJournal of Cataract & Refractive Surgery, 2007
- Central corneal thickness measurements using Orbscan II, Visante, ultrasound, and Pentacam pachymetry after laser in situ keratomileusis for myopiaJournal of Cataract & Refractive Surgery, 2007