方法：选择正视眼飞行员13例26眼、中低度近视飞行员12例24眼、LASIK术后6mo以上飞行员10例20眼，分别进行明视、暗视、暗视+眩光3种环境下4种空间频率(3，6，12，18cpd)的对比敏感度检测，并对结果进行统计学分析。

结果：明视下除在低频(3cpd)下，三组CS无统计学差异(P>0.05)，其他中高频下对照组均高于戴镜组和手术组(P<0.05)，戴镜组与手术组间比较差异无统计学意义(P>0.05)； 暗视低频(3cpd)下，三组CS无统计学差异(P>0.05)，中高频率下对照组和手术组CS值高于戴镜组，差异有统计学意义(P<0.05)，对照组CS值高于手术组，差异无统计学意义(P>0.05)； 暗视+眩光环境下各个空间频率时对照组明显高于戴镜组和手术组，差异有统计学意义(P<0.05)，戴镜组高于手术组，但两者间差异无统计学意义(P>0.05)。

结论：准分子原位角膜磨镶术后飞行员的对比敏感度较正视眼有所降低，在暗视+眩光环境下更为明显，需建立更为完善的术后鉴定和放飞标准。

METHODS: The CS of 13 emmetropic pilots(26 eyes), 12 glasses wearing pilots(24 eyes)and 10 with LASIK(20 eyes), under photopic, scotopic and scotopic with glare environments at four different spatial frequencies(3, 6, 12 and 18cpd)were measured and the resluts were analyzed by statistics.

RESULTS: Under photopic environments, there was no significant difference in the low spatial frequency(3cpd)among the three groups(P>0.05). The CS of emmetropic pilots was better than that of the myopic and with LASIK, and there was significant difference(P<0.05). There was no significant difference in CS between myopic and with LASIK(P>0.05). Under scotopic environments, there was no significant difference in the low spatial frequency(3cpd)among the three groups(P>0.05). The CS of emmetropic and with LASIK pilots were better than that of the myopic, and there was significant difference(P<0.05).There was no significant difference in CS between emmetropic and with LASIK(P>0.05). Under scotopic with glare environments, the CS of emmetropic and myopic pilots were better than that of the with LASIK, and there was significant difference(P<0.05). There was no significant difference in CS between myopic and with LASIK(P>0.05).

CONCLUSION: The CS after LASIK is decreased compare with emmetropic pilot, specially under scotopic with glare environments. A perfect identification standard should be set up.