Alió Jorge L, Javaloy Jaime, Osman Amr A, Galvis Virgilio, Tello Alejandro, Haroun Hazem E
Instituto Oftalmológico de Alicante, University of Miguel Hernández, Alicante, Spain.
J Cataract Refract Surg. 2004 Nov;30(11):2303-10. doi: 10.1016/j.jcrs.2004.04.048.
To investigate the correction of post-penetrating keratoplasty (PKP) astigmatism using laser in situ keratomileusis (LASIK). Visual and refractive outcomes were evaluated after LASIK was performed in 1 step (lamellar cut and ablation in 1 procedure) or 2 steps (lamellar cut then ablation in 2 successive procedures).
Department of Cornea and Refractive Surgery, Vissum-Instituto Oftalmológico de Alicante, University of Miguel Hernández, Alicante, Spain.
In this prospective observational study, 22 consecutive eyes were divided into 2 groups depending on the LASIK procedure performed to correct post-PKP astigmatism. Group 1 (1-step LASIK) included 11 eyes and Group 2 (2-step LASIK), 11 eyes. The patients were followed for 6 months.
A statistically significant improvement was obtained in Group 2 with a mean vector analysis result of the cylinder of -4.37 diopters (D) +/- 1.79 (SD) (P = .018). In Group 1, the mean astigmatism correction was 2.38 +/- 1.71 D. The number of reoperations and residual refractive defects were significantly better in Group 2.
The 2-step technique improved the accuracy of excimer laser correction of post-PKP astigmatism.
探讨使用准分子原位角膜磨镶术（LASIK）矫正穿透性角膜移植术（PKP）后散光的效果。在LASIK分一步进行（在一个手术过程中进行板层切割和消融）或两步进行（在两个连续的手术过程中先进行板层切割然后进行消融）后，评估视觉和屈光结果。
西班牙阿利坎特米格尔·埃尔南德斯大学维苏姆眼科研究所角膜与屈光手术科。
在这项前瞻性观察研究中，根据用于矫正PKP后散光的LASIK手术方式，将连续22只眼分为2组。第1组（一步LASIK）包括11只眼，第2组（两步LASIK）包括11只眼。对患者进行了6个月的随访。
第2组获得了统计学上的显著改善，柱镜平均矢量分析结果为-4.37屈光度（D）±1.79（标准差）（P = 0.018）。在第1组中，平均散光矫正为2.38±1.71 D。第2组的再次手术次数和残余屈光缺陷明显更好。
两步技术提高了准分子激光矫正PKP后散光的准确性。
