Kymionis George D, Yoo Sonia H, Ide Takeshi, Culbertson William W
Corneal and External Diseases Department, Bascom Palmer Eye Institute, Miami, Florida, USA.
J Cataract Refract Surg. 2009 Jan;35(1):11-3. doi: 10.1016/j.jcrs.2008.08.039.
We describe the technique of femtosecond-assisted astigmatic keratotomy (AK) in a post-keratoplasty patient with irregular, nonorthogonal astigmatism. Using the keratoplasty software, an anterior arcuate side cut (400 mum thick, 6.5 mm diameter) was created using the femtosecond laser in a 68-year-old woman with irregular astigmatism 28 years after penetrating keratoplasty for keratoconus. No intraoperative or postoperative adverse events were seen during the follow-up period. Six months after the procedure, the uncorrected visual acuity improved from 20/60 to 20/50 and the best spectacle-corrected visual acuity, from 20/50 to 20/32. The mean manifest astigmatic correction decreased from 4.00 diopters (D) to 0.50 D; corneal topography showed a significant improvement in irregular astigmatism. The technique of femtosecond-assisted AK is simple and efficient for managing irregular and nonorthogonal astigmatism in post-keratoplasty patients and may overcome the limitations of earlier techniques.
我们描述了在一名角膜移植术后患有不规则、非正交散光的患者中进行飞秒辅助散光性角膜切开术（AK）的技术。在一名68岁女性患者中，该患者在圆锥角膜穿透性角膜移植术后28年出现不规则散光，使用飞秒激光并借助角膜移植软件制作了一个前弧形侧切（厚400微米，直径6.5毫米）。在随访期间未观察到术中或术后不良事件。术后6个月，未矫正视力从20/60提高到20/50，最佳眼镜矫正视力从20/50提高到20/32。平均明显散光矫正度数从4.00屈光度（D）降至0.50 D；角膜地形图显示不规则散光有显著改善。飞秒辅助AK技术对于处理角膜移植术后患者的不规则和非正交散光简单有效，并且可能克服早期技术的局限性。
