首页> 外文期刊>Journal of refractive surgery >Proper positioning of the plume evacuator in the VISX Star3 excimer laser minimizes central island formation in patients undergoing laser in situ keratomileusis.
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Proper positioning of the plume evacuator in the VISX Star3 excimer laser minimizes central island formation in patients undergoing laser in situ keratomileusis.

机译:在VISX Star3受激准分子激光器中正确放置羽流排空装置,可最大程度地减少接受原位角膜磨镶术的患者的中央岛状形成。

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摘要

PURPOSE: To identify risk factors in a series of patients who developed steep central islands after laser in situ keratomileusis (LASIK). METHODS: We analyzed and compared the refractive and topographic outcome of a study group composed of 83 eyes of 44 patients who underwent LASIK using the VISX Star3 excimer laser with a refraction-matched control group of 83 eyes treated later. The vacuum aspirator of the excimer laser was abnormally positioned during the surgeries performed in the study group. RESULTS: Mean preoperative spherical equivalent refraction in the study group was -6.75 +/- 2.50 D. Four eyes with a mean preoperative spherical equivalent refraction of -9.27 +/- 2.29 D developed steep central islands. Thirty-three (38%) of 83 eyes treated needed retreatment for residual myopia or myopic astigmatism. In the control group, mean preoperative spherical equivalent refraction was -6.76 +/- 2.50 D. Ninety-three percent of eyes were within +/- 1.00 D of target refraction. Five (6.02%) of 83 eyes required retreatment and no eyes developed central islands. CONCLUSION: The abnormally positioned vacuum aspirator coupled with the higher preoperative refractive correction were the likely causative factors for central island formation and the increased incidence of undercorrection in these patients.
机译:目的:确定一系列在激光原位角膜磨镶术(LASIK)后发展为陡峭中央岛的患者的危险因素。方法:我们分析并比较了由VISX Star3准分子激光进行LASIK手术的44例患者的83眼组成的研究组的屈光和地形学结果,以及后来治疗的83眼屈光度匹配对照组。在研究组进行的手术过程中,准分子激光器的真空吸引器位置异常。结果:研究组的术前平均等效球镜屈光度为-6.75 +/- 2.50D。术前平均等效球镜屈光度为-9.27 +/- 2.29 D的四只眼形成了陡峭的中央岛。需要治疗的83眼中有33眼(38%)需要再次治疗,以消除残留的近视或近视散光。在对照组中,术前平均球镜等效屈光度为-6.76 +/- 2.50D。百分之九十三的眼睛在目标屈光度的+/- 1.00 D之内。 83眼中有5眼(6.02%)需要再治疗,并且没有眼睛形成中央岛。结论:这些患者中,定位不正确的真空吸引器加上较高的术前屈光矫正可能是中央岛形成和矫正不足发生率增加的可能原因。

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