Corneal versus scleral tunnel incision in cataract surgery: A randomized study
Corneal versus scleral tunnel incision in cataract surgery: A randomized study
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DOI：
10.1016/s0886-3350(97)80176-9
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发表时间：
1997-04-01
影响因子：
2.8
通讯作者：
Hjortdal, JO
中科院分区：
文献类型：
--
作者：
Olsen, T;DamJohansen, M;Hjortdal, JO
目的：方法：将100例术前散光小于1.0 D的白内障超声乳化患者随机分为透明角膜切口组（50例）和巩膜隧道切口组（50例），比较巩膜隧道切口和巩膜隧道切口术后的规则和不规则散光。所有切口均为3.5至4.0 mm宽，并在角膜散光的最陡轴上制作。手术引起的散光通过角膜曲率数据的矢量分析以及地形数据的傅立叶谐波级数分析进行分析。手术后一天，手术引起的散光角膜切口组和巩膜切口组的角膜曲率（向量分析，角膜曲率）分别为1.41 D +/- 0.66（SD）和0.55 +/- 0.31 D，01）。术后6个月，两组的诱导散光分别为0.72 +/- 0.35 D和0.36 +/- 0.21 D（P <0.01）。角膜地形图数据证实了常规角膜曲率计发现的规则散光变化。然而，此外，傅立叶谐波系列分析的地形dal：a显示显着更多的不规则诱导散光与角膜的方法比巩膜approach.Conclusion：透明角膜切口诱导更显着的规则，以及不规则散光比巩膜隧道切口。
Purpose: To compare the induced regular and irregular astigmatism after sclera( and corneal tunnel incision.Setting: University hospital outpatient cataract clinic.Methods: One hundred phacoemulsification patients with less than 1.0 diopter (D) of preoperative astigmatism were randomly assigned to have a clear corneal incision (50 patients) or a scleral tunnel incision (50 patients). All incisions were 3.5 to 4.0 mm wide and were made in the steepest axis of the corneal astigmatism. The surgically induced astigmatism was analyzed by vector analysis from keratometric data, as well as by Fourier harmonic series analysis of the topographic data.Results: One day after surgery, the surgically induced astigmatism (vector analysis, keratometry) was 1.41 D +/- 0.66 (SD) and 0.55 +/- 0.31 D in the corneal incision group and the scleral incision group, respectively (p < .01). Six months after surgery, the induced astigmatism was 0.72 +/- 0.35 D and 0.36 +/- 0.21 D in the two groups, respectively (P < .01). The corneal topography data confirmed the regular astigmatism changes found by conventional keratometry. However, in addition, Fourier harmonic series analysis of the topography dal:a showed significantly more irregular induced astigmatism with the corneal approach than with the scleral approach.Conclusion: The clear corneal incision induces significantly more regular as well as irregular astigmatism than the scleral tunnel incision.