用于矫正散光的环形角膜切开术。
Circular keratotomy for the correction of astigmatism.
作者信息
Krumeich J H, Knuelle A
机构信息
Department of Ophthalmology, Marien Hospital, Bochum, Germany.
出版信息
Refract Corneal Surg. 1992 May-Jun;8(3):204-10.
BACKGROUND
Mathematical and physical considerations that are contained in Gauss' law lead to the concept of a circular cut for the correction of corneal astigmatism.
METHODS
The method applied is the coupling of the aspheric corneal surface to the spherical obturator of the Guided Trephine System and cutting of 90% of the parenchyma. Nineteen human eyes were treated with this technique, using a double-running suture closure.
RESULTS
Results of reduction of astigmatism can regularly be obtained but are of different amounts depending on the origin of astigmatism. Mean preoperative refractive astigmatism was 5.41 diopters and mean postoperative refractive astigmatism was 1.34 D. Six eyes required additional tranverse arcuate keratotomy.
CONCLUSIONS
The procedure is effective, but the results are variable. It may be improved by the use of obturators that fit the radius of curvature of the cornea.
背景
高斯定律中包含的数学和物理考量引出了用于矫正角膜散光的环形切口概念。
方法
所应用的方法是将非球面角膜表面与引导性环钻系统的球形闭塞器相耦合，并切除90%的实质层。使用双行缝合关闭，对19只人眼采用该技术进行治疗。
结果
散光减少的结果通常可以获得，但根据散光的来源不同，减少量也不同。术前平均屈光性散光为5.41屈光度，术后平均屈光性散光为1.34 D。6只眼睛需要额外进行横向弧形角膜切开术。
结论
该手术有效，但结果存在差异。通过使用与角膜曲率半径相匹配的闭塞器，可能会改善该手术效果。
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