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首页> 外文期刊>Graefe's archive for clinical and experimental ophthalmology: Albrecht von Graefes Archiv fur klinische und experimentelle Opthalmologie >Comparison of optical quality parameters and ocular aberrations after wavefront-guided laser in-situ keratomileusis versus wavefront-guided laser epithelial keratomileusis for myopia
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Comparison of optical quality parameters and ocular aberrations after wavefront-guided laser in-situ keratomileusis versus wavefront-guided laser epithelial keratomileusis for myopia

机译：波前引导的激光原位角膜磨镶术与波前引导的激光上皮角膜磨镶术的近视光学质量参数和眼像差的比较

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Background: To compare optical quality, ocular scattering, and higher-order aberrations (HOAs) after laser in-situ keratomileusis (LASIK) versus laser epithelial keratomileusis (LASEK). Methods: A total of 47 eyes from 47 participants who had undergone LASIK (group I) or LASEK (group II) procedure at least 6 months prior were enrolled. Ocular aberrations and modulation transfer function (MTF) values measured using iTrace, a ray-tracing type aberrometer, were compared to MTF (modulation transfer function) cut-off values, Strehl ratio, and objective indices of scattering obtained using the Objective Quality Analysis System II (OQAS II). Results: There was no significant correlation between the postoperative optical quality parameters and the HOAs between both groups. In group I, the MTF cut-off value was significantly correlated with cylinder refraction (p∈=∈0.037), and the objective scattering index (OSI) was positively correlated with spherical equivalent (p∈=∈0.023). In group II, there was a statistically significant correlation between the OSI and achieved refractive correction (p∈=∈0.001). Regression analysis showed that the OSI was the most significant predictor of MTF cut-off values after refractive surgery. Additionally, MTF values measured by OQAS were significantly lower than those measured by iTrace without correlation. Conclusion: Optical quality after refractive surgery may be influenced by not only ocular aberrations but also by scattering. Even though the accuracies of the machines used in this study to measure optical quality have yet to be proven, this study showed limited correlation among the values measured using the two different machines after refractive surgery. Therefore, for more generalized evaluation of visual function after refractive surgery, more advanced optical devices still need to be developed.
机译：背景：为了比较激光原位角膜磨镶术（LASIK）与激光上皮角膜磨镶术（LASEK）后的光学质量，眼散射和高阶像差（HOA）。方法：纳入至少47个月前接受LASIK（I组）或LASEK（II组）手术的47位参与者的47只眼睛。使用iTrace（光线跟踪型像差仪）测量的眼像差和调制传递函数（MTF）值与使用客观质量分析系统获得的MTF（调制传递函数）截止值，斯特列尔比和散射的客观指标进行了比较II（OQAS II）。结果：两组术后光学质量参数与HOA之间无显着相关性。在第一组中，MTF截止值与圆柱折射显着相关（p∈=∈0.037），而客观散射指数（OSI）与球等效值正相关（p∈=∈0.023）。在第二组中，OSI与获得的屈光矫正之间存在统计学上的显着相关性（p∈=ε0.001）。回归分析表明，OSI是屈光手术后MTF截止值的最重要预测指标。此外，通过OQAS测量的MTF值显着低于通过iTrace测量的相关性。结论：屈光手术后的光学质量可能不仅受到眼像差的影响，而且还可能受到散射的影响。尽管本研究中用来测量光学质量的机器的准确性尚未得到证实，但这项研究表明在屈光手术后使用两种不同机器测量的值之间的相关性有限。因此，为了更广泛地评估屈光手术后的视觉功能，仍然需要开发更先进的光学设备。

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