准分子激光角膜屈光手术后角膜后表面非球面性的变化  

Changes of corneal posterior surface asphericity after excimer laser corneal refractive surgery

作　　者：张晓琳[1] 范光忠[1] 叶树波 

机构地区：[1]昆明普瑞眼科医院,云南省昆明市650231

出　　处：《眼科新进展》2014年第4期364-365,368,共3页Recent Advances in Ophthalmology

摘　　要：目的探讨准分子激光角膜屈光手术后角膜后表面非球面性的变化。方法选取2012年3月至2013年3月于我院接受准分子激光角膜屈光手术治疗的近视患者120例,均选右眼进行研究,分别于术前、术后1个月及术后6个月采用Pentacam系统检查患者角膜后表面在6 mm、7 mm、8 mm、9 mm等不同直径下的Q值(Q6、Q7、Q8、Q9),并检测术前中央角膜厚度(central corneal thickness,CCT)和术中激光切削深度(ablation depth,AD)。结果术后1个月,所有患者角膜后表面Q值均高于术前Q值,其中术后Q6、Q7、Q8与术前比较,差异均有统计学意义(均为P<0.05),而Q9与术前比较,差异无统计学意义(P>0.05);术后6月,所有患者Q值均低于术前,但只有行LASIK患者Q9与术前比较,差异有统计学意义(P=0.017),其余与术前比较,差异均无统计学意义(均为P>0.05);术后6个月所有患者角膜后表面Q值均较术后1个月明显有所下降,差异均有统计学意义(均为P<0.05)。所有患者手术前后Q值变化与CCT和AD均无明显的相关性(均为P>0.05)。结论准分子激光角膜屈光手术后早期能影响角膜后表面的非球面性,Q值增大,后逐渐恢复至术前水平。Objective To analyze the changes of asphericity of corneal posterior surface after excimer laser corneal refractive surgery. Methods Clinical data of pa- tients who received excimer laser corneal refractive surgery at our hospital from March 2012 to March 2013 were retrospectively analyzed, the right eyes of all patients were chosen for study, the Q values of corneal posterior surface under pupil diameter with 6 ram, 7 mm, 8 mm, 9 mm were examined by Pentacam at post-operation and postopera- tive 1 month, 6 months, the preoperative central corneal thickness （CCT）and intraop- erative ablation depth （AD） were also detected. Results At postoperative 1 month, the Q values of corneal posterior surface in there were statistical differences in QS, Q7 〈 0.05 ）, and no statistical difference in Q9 all patients were higher than pre-operation, and Q8 compared with pre-operation （ all P （P 〉 0.05 ）. At postoperative 6 months, theQ values of all patients were lower than pre-operation, but the difference was statistically significant only in Q9 （ P = 0.017）. The Q values of all patients at postoperative 5 months were obviously lower than those at postoperative 1 month, there were statistical differences （ all P 〈 0.05 ）. The changes of Q value before and after operation was not correlated with CCT and AD （ all P 〈 0.05 ）. Conclusion The asphericity of corneal posterior surface is influenced by excimer laser cor- neal refractive surgery at the early time, the Q value increase, and then it return to its original state over time.

关 键 词：准分子激光角膜屈光手术 角膜后表面 非球面性 

分 类 号：R779.63[医药卫生—眼科]