Agapitos P J, Lindstrom R L, Williams P A, Sanders D R
Department of Ophthalmology, University of Minnesota, Minneapolis 55455.
J Cataract Refract Surg. 1989 Jan;15(1):13-8. doi: 10.1016/s0886-3350(89)80134-8.
Eighty-two keratotomy procedures were performed for both idiopathic and postsurgical astigmatism or myopic astigmatism and analyzed for efficacy using vector and linear regression analysis. Delta keratometry values (delta K) were computed for each case as delta K in the desired axis of effect using vector analysis. Six different procedures were compared including both intersecting and nonintersecting trapezoidal keratotomy, relaxing incisions with compression sutures, T cuts with radial keratotomy, T cuts alone, and RK with elliptical optical zones. Our results showed that the greatest shifts occurred in the trapezoidal groups, whereas the most predictable effects occurred in the relaxing incision/compression suture group. Astigmatic keratotomy is capable of producing large shifts in corneal astigmatism; however, the accuracy of these procedures remains highly variable.
针对特发性散光、术后散光或近视散光实施了82例角膜切开术，并采用矢量分析和线性回归分析对其疗效进行分析。利用矢量分析为每个病例计算预期效应轴上的角膜曲率计差值（δK）。比较了六种不同的手术方法，包括相交和不相交的梯形角膜切开术、带压迫缝线的松解切口、带放射状角膜切开术的T形切口、单独的T形切口以及带椭圆形光学区的放射状角膜切开术。我们的结果显示，梯形组的移位最大，而松解切口/压迫缝线组的效果最可预测。散光性角膜切开术能够使角膜散光产生较大移位；然而，这些手术的准确性仍然差异很大。
