准分子激光手术后角膜Q值的变化  

Change of Q Values after Excimer Laser Surgery

作　　者：王静[1] 徐艳丽[2] 贡雅洁[2] 

机构地区：[1]大连医科大学,七年制2007级大连市116044 [2]大连医科大学附属二院眼科

出　　处：《中国激光医学杂志》2015年第1期27-31,共5页Chinese Journal of Laser Medicine & Surgery

摘　　要：目的观察准分子激光手术矫正中低度近视术后角膜Q值的变化。方法回顾性分析2012~2013年,接受准分子激光手术治疗中低度近视患者100例100只眼,分为两组：准分子激光原位角膜磨镶术（laser in situ keratomileusis,LASIK）组,患者50例50只眼;准分子激光上皮瓣下角膜磨镶术（laser epithelial keratomileusis,LASEK）组,患者50例50只眼。比较两组患者术前、术后角膜Q值的变化。结果两组患者术后1年,裸眼视力均≥1.0;安全性指数均〉1.0;有效性指数均接近1.0。两组患者术后Q值均从负值变为正值,与术前比较差异有显著意义（P〈0.01）。结论准分子激光角膜屈光手术能够有效、安全地矫正中低度近视,效果稳定可靠。术后角膜前表面Q值变为正值,角膜形态呈扁椭球面。Objective To observe the clinical effect of laser ablation on medium-low myopia.Methods A retrospective analysis was performed. Altogether 100 medium-low myopic patients（ 100 eyes） were treated with traditional laser ablation,including 50 patients（ 50 eyes） with laser in situ keratomileusis（ LASIK） and 50 patients（ 50 eyes） with laser epithelial keratomileusis（ LASEK）. The preoperative and postoperative Q values were compared with paired t tests and independent sample t tests.Results All patients had a visual acuity over 1. 0 a year after the operation. For both the LASIK group and LASEK group,the safety measures were greater than 1 and validity measures close to 1. Compared to the preoperative Q value,the postoperative Q value in both the LASIK and LASEK groups had changed from the negative to the positive.Conclusions As to medium-low myopia,traditional laser ablation performs well in safety,efficacy and predictability. Compared to the preoperative Q value,the postoperative Q value in both the LASIK and LASEK groups had changed from the negative to the positive. No difference between the LASIK and LASEK groups in increase of Q values was observed.

关 键 词：激光 近视 Q值 角膜磨镶术 角膜切削术 

分 类 号：R779.63[医药卫生—眼科]