Chalita Maria Regina, Xu Meng, Krueger Ronald R
Department of Ophthalmology, Federal University of Sao Paulo, Sao Paulo, Brazil.
J Refract Surg. 2004 Sep-Oct;20(5):S624-30.
To evaluate the outcome of wavefront-guided ablations for the correction of residual myopia and astigmatism after standard laser in situ keratomileusis (LASIK).
Twenty nine eyes of 26 patients who underwent wavefront-guided LASIK retreatment with Alcon CustomCornea (Alcon Laboratories Inc, Fort Worth, Tex) were evaluated. Complete ophthalmologic examination, corneal topography, and wavefront measurements were performed. Uncorrected visual acuity (UCVA), best spectacle-corrected visual acuity (BSCVA), manifest refraction, and wavefront analysis were evaluated preoperatively, 1 week, 3 months, and 6 months after surgery. Wavefront measurements were assessed using the LADARWave device. Statistical analysis was performed using the McNemar test and percentages of success.
One week postoperatively, UCVA was > or =20/40 in 100% of eyes (> or =20/20 in 31%) and BSCVA was > or =20/40 in 100% (> or =20/20 in 73%). Wavefront analysis showed a decrease in total aberrations, high order aberrations, defocus, coma, spherical aberration, and other terms of higher order aberrations at 1-week follow-up. Three months postoperatively, UCVA was > or =20/40 in 100% of eyes (> or =20/20 in 38%) and BSCVA was > or =20/40 in 100% (> or =20/20 in 81%). Six months postoperatively, UCVA was > or =20/40 in 100% of eyes (> or =20/20 in 60%) and BSCVA was > or =20/40 in 100% (> or =20/20 in 90%). Wavefront analysis showed decrease in total aberration, high order aberration, defocus, coma, and spherical aberration.
Wavefront-guided LASIK retreatment in post-LASIK eyes represents a good option for laser vision correction. All eyes showed reduction in pre-existing total aberrations. Some high order aberration components decreased in this initial series. Further follow-up is necessary to assess the initial predictability of wavefront-guided LASIK upgrade.
评估波前引导的准分子原位角膜磨镶术（LASIK）用于矫正标准LASIK术后残余近视和散光的效果。
对26例接受爱尔康CustomCornea（爱尔康实验室公司，沃思堡，德克萨斯州）波前引导LASIK再次手术的29只眼进行评估。进行了全面的眼科检查、角膜地形图和波前测量。在术前、术后1周、3个月和6个月评估裸眼视力（UCVA）、最佳矫正视力（BSCVA）、显验光和波前分析。使用LADARWave设备评估波前测量。采用McNemar检验和成功率百分比进行统计分析。
术后1周，100%的眼睛UCVA≥20/40（31%的眼睛≥20/20），100%的眼睛BSCVA≥20/40（73%的眼睛≥20/20）。波前分析显示，在1周随访时，总像差、高阶像差、散焦、彗差、球差和其他高阶像差项均有所降低。术后3个月，100%的眼睛UCVA≥20/40（38%的眼睛≥20/20），100%的眼睛BSCVA≥20/40（81%的眼睛≥20/20）。术后6个月，100%的眼睛UCVA≥20/40（60%的眼睛≥20/20），100%的眼睛BSCVA≥20/40（90%的眼睛≥20/20）。波前分析显示总像差、高阶像差、散焦、彗差和球差均降低。
LASIK术后眼睛进行波前引导的LASIK再次手术是激光视力矫正的一个良好选择。所有眼睛的原有总像差均降低。在这个初始系列中，一些高阶像差成分有所下降。需要进一步随访以评估波前引导LASIK升级的初始可预测性。
