Evaluation of Factors Influencing the Remaining Astigmatism After Toric Intraocular Lens Implantation
Evaluation of Factors Influencing the Remaining Astigmatism After Toric Intraocular Lens Implantation
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DOI：
10.3928/1081597x-20140429-01
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发表时间：
2014-06-01
影响因子：
2.4
通讯作者：
Findl, Oliver
中科院分区：
文献类型：
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作者：
Hirnschall, Nino;Hoffmann, Peter C.;Findl, Oliver
目得：评价白内障手术中植入散光矫正型人工透镜后剩余散光的影响因素。方法：在这项观察性研究中，纳入了来自三个不同中心的连续白内障患者，这些患者均接受了散光矫正型人工晶状体。术前使用光学生物测量设备进行角膜曲率测量。在维也纳使用IOLMaster 500（Carl Zeiss Meditec AG，Jena，德国），在Castrop-Rauxel使用Lenstar（Haag-Streit，Koniz，Switzerland），在伦敦使用IOLMaster（Carl Zeiss Meditec AG）。结果：共纳入200例235眼患者，所有患者均接受了手术治疗。术前使用光学生物测量装置测量的平均角膜散光为-2.24 +/- 0.87屈光度（D）（范围：-5.75至-1.00 D）。目标散光和术后测量散光之间的平均绝对差和矢量差分别为0.48 +/- 0.37 D（范围：0.00至2.05 D）和0.73 +/- 0.46 D（范围：0.031至-2.20 D）（P = 0.576）。偏最小二乘回归显示了显着的效果，术前测量的角膜散光和术前测量的角膜之间的偏差对术后（意外）剩余astigmatory.CONCLUSIONS：使用复曲面人工晶状体时，误差的主要来源是术前测量的角膜散光，特别是在低散光的眼睛。术后前房深度对散光矫正型人工晶状体柱镜屈光度的影响以及错位对降低散光矫正效果的影响可以很容易地计算出来。
PURPOSE: To evaluate the influencing factors on remaining astigmatism after implanting a toric intraocular lens during cataract surgery.METHODS: In this observational study, consecutive patients with cataract from three different centers who received toric intraocular lenses were included. Keratometry was performed with an optical biometry device preoperatively. The IOLMaster 500 (Carl Zeiss Meditec AG, Jena, Germany) was used in Vienna, Lenstar (Haag-Streit, Koniz, Switzerland) in Castrop-Rauxel, and IOLMaster (Carl Zeiss Meditec AG) in London. Partial least squares regression was used to detect the influence of different parameters on remaining astigmatism.RESULTS: In total, 235 eyes of 200 patients were included. Mean corneal astigmatism measured preoperatively with the optical biometry device was -2.24 +/- 0.87 diopters (D) (range: -5.75 to -1.00 D). Mean absolute and vector difference between the aimed for and the postoperatively measured astigmatism were 0.48 +/- 0.37 D (range: 0.00 to 2.05 D) and 0.73 +/- 0.46 D (range: 0.031 to -2.20 D), respectively (P = .576). Partial least squares regression showed a significant effect of preoperatively measured corneal astigmatism and deviation between preoperative measurements of the cornea on the postoperative (unintended) remaining astigmatism.CONCLUSIONS: The main source of error when using toric intraocular lenses is the preoperative measurement of corneal astigmatism, especially in eyes with low astigmatism. The influence of the postoperative anterior chamber depth on the cylindrical power of toric intraocular lenses and the effect of misalignment on the reduction of the astigmatism-reducing effect can be easily calculated.