方法：随机选取2013-09/2014-07在民航总医院进行年度体检的现役民航飞行员，要求任何一眼裸眼视力≥1.0，无眼部疾病及相关全身疾病，按不同年龄将其分为4组，A组(20～29岁)、B组(30～39岁)、C组(40～49岁)、D组(50～59岁)，每组50名100眼，应用OPTEC 6500视功能检测仪检测每眼在明视和暗视状态下不同空间频率的CS。

结果：各年龄段民航飞行员CS曲线均呈“倒U形”改变，在中频区(3.0c/d和6.0c/d)最高。明视状态下，空间频率6、12和18c/d，D组与其他三组比较，CS值降低，差异具有统计学意义(P<0.01)； 暗视状态下，空间频率1.5、3和6c/d，D组与其他三组比较，CS值降低，差异具有统计学意义(P<0.01)。

结论：该调查较为客观地反映了不同年龄段民航飞行员的CS特征，为深入研究民航飞行员的视功能特点以及获得民航飞行员CS正常值提供了参考依据。

METHODS: Four hundred eyes of 200 commissioned civil aviators from Civil Aviation General Hospital from September, 2013 to July, 2014 were randomly divided into four groups: group A(age 20～29), group B(age 30～39), group C(age 40～49), group D(age 50～59), and 50 people in each group(100 eyes). All of the eyes naked vision had to be ≥1.0, with no eye disease and associated systemic diseases. The CS of different spatial frequencies was measured with OPTEC 6500 under light and dark room.

RESULTS: The CS curves of groups were all presented with inverted U shape, and the CS was highest in intermediate frequency area(3.0c/d and 6.0c/d). Compared with that in the rest three groups, the values of CS at spatial frequency(6, 12 and 18c/d)under light room were decreased in group D, with statistical significance(P<0.01). Compared with that in the rest three groups, the values of CS at spatial frequency(1.5, 3 and 6c/d)under dark room were decreased in group D, with statistical significance(P<0.01).

CONCLUSION: This survey objectively reflects the characteristics of civil aviator CS of different ages, and provides reference date for further study on civil aviator visual function characteristics and obtaining the normal reference value of civil aviator CS.