目的：通过将行准分子激光原位角膜磨镶术( LASIK)后的飞行员与正视眼和戴镜飞行员的对比敏感度( CS)进行比较,为手术后的体检鉴定标准提供依据。 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6 mo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(3,6,12,18 cpd )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(3 cpd )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(P0.05)；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(P0.05)；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(P0.05)。 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。%AIM: To observe the changes in contrast sensitivity (CS) between emmetropic pilots, glasses wearing, and after laser in situ keratomileuses ( LASIK) surgery pilots, provide the basis for the physical examination standard after operation. 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 (P0. 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 ( P0. 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 (P0. 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.
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