Neumann A C, McCarty G R, Sanders D R, Raanan M G
Neumann Eye Institute, DeLand, Florida 32720.
J Cataract Refract Surg. 1989 Jan;15(1):25-31. doi: 10.1016/s0886-3350(89)80136-1.
We evaluated the efficacy of three transverse incision astigmatic keratotomy procedures using a vector analysis that enabled us to determine the magnitude of the effect and the axis in which it occurred. These procedures were used for low levels of astigmatism (0.5 diopter [D] to 3.75 D): (1) staggered, radial-touching transverse (T) incisions, (2) non-radial-touching T incisions, and (3) T incisions with interrupted radial. Most procedures were performed in conjunction with radial keratotomy for spherical correction of myopia. The non-radial-touching T procedure was the least effective method of reducing astigmatism. The staggered, radial-touching T and T with interrupted radial procedures were equally effective in reducing over 93% (on the average) of the preoperative astigmatism. Of these two procedures, the T with interrupted radial procedure was the most accurate, with the effect of the surgery deviating less than ten degrees from the desired axis in over 70% of the eyes.
我们使用矢量分析评估了三种横向切口散光性角膜切开术的疗效，该分析使我们能够确定效果的大小及其发生的轴。这些手术用于低水平散光（0.5屈光度[D]至3.75 D）：（1）交错、径向接触的横向（T）切口，（2）非径向接触的T切口，以及（3）带有间断径向的T切口。大多数手术与放射状角膜切开术联合进行，用于近视的球面矫正。非径向接触的T手术是减少散光最无效的方法。交错、径向接触的T手术和带有间断径向的T手术在平均减少超过93%的术前散光方面同样有效。在这两种手术中，带有间断径向的T手术最精确，超过70%的眼睛手术效果与预期轴的偏差小于10度。
