AIM: To study the influential factors of the contrast sensitivity function(CSF), we tested and investigated the CSF of navy pilots.

METHODS: Totally 58 pilots(116 eyes)were examined by CSF under the nighttime, nighttime & periglare, daytime, daytime & periglare conditions for 5 spacial frequencies with OPTEC6 500 Vision Tester.

RESULTS: From mean diagram of curves, the peak of CSF under the nighttime, nighttime & periglare conditions was at 3-6c/d, daytime, daytime & periglare conditions was at 6c/d.

CONCLUSION: The distant CSF is better than the near CSF in navy pilots,the binoculus CSF is better than that of the single eye. The spatial characteristics of CSF in navy pilots were reflected by present study.