准分子激光角膜原位联合角膜瓣背面磨镶术治疗LASIK术后屈光回退

Laser in situ & undersurface of flap keratomileusis for regression after laser in situ kertomileusis

目的探讨准分子激光角膜原位联合角膜瓣背面磨镶术治疗LASIK术后屈光回退的有效性和安全性。方法对10例(15眼)LASIK术后屈光回退,剩余的角膜基质层厚度不足以矫正的患者行准分子激光角膜原位联合角膜瓣背面磨镶术治疗。结果术后复查角膜瓣平整、复位良好。术后视力第1天、1周、3个月均值分别为0.95±0.26、0.98±0.25、1.02±0.26;术前屈光度(-2.5±1.25)DS,散光(-1.05±0.65)DC;术后3个月的屈光度(-0.37±0.50)DS,散光(-0.50±0.37)DC,术后与术前相比差异有统计学意义(F=6.250,P=0.002;F=3.086,P=0.043),术后3个月时15眼均达到或超过术前最佳矫正视力。结论准分子激光角膜原位联合角膜瓣背面磨镶术可以安全有效地治疗LASIK术后屈光回退、术前预测角膜基质层厚度不够的近视患者,而且无明显并发症,但远期疗效还有待进一步观察。

Objective To study the efficacy and safety of laser in situ ＆ undersurface of flap keratomileusis （LASUK） for regression after laser in situ keratomileusis. Methods LASIK was performed in 10 cases （ 15 eyes） of regression after laser in situ keratomileusis with insufficient corneal stroma, Results Postoperative examination showed that the corneas were transparent and the flap did not displace. Meanuncorrected visual acuity increased to 0. 95 ± 0.26,0.98 ± 0.25,1.02 ± 0.26 ; 1,7 days and 3 months after operation mean spherical equivalent refraction and mean cylinder refraction decreased from （ - 2.50 ± 1.25 ） DS and （ - 1.05 ± 0.65 ） DC before operation to （ - 0.37 ± 0.50 ） DS and （ - 0.50 ± 0. 37 ） DC 3 months after operation （ F = 6. 250, P = 0.002 ; F = 3. 086, P = 0. 043 ）. Fifteen eyes reached or exceeded their preoperative best corrected visual acuity 3 months after operation. Condusion Laser in situ ＆ undersurface of flap keratomileusis for regression after laser in situ keratomileusis is effective and safe, no complication occurred,but further efficacy would be confirmed.