METHODS: The contrast visual acuity of the students in Grade One and Grade Two at an aviation university was recorded and analyzed, and the visual habits were recorded and analyzed by questionnaire.

RESULTS: A total of 117 students in Grade One and 210 students in Grade Two were enrolled. The contrast visual acuity of both eyes over 1.0 were 83 students(70.9%)in Grade One and 174 students(82.9%)in Grade Two respectively(P<0.05). Questionnaire survey on the eye care habits by students, showing the second grade students of daily reading time, outdoor sports, sports category, use at night time, with a focus on electronic product knowledge and the degree of attention and when flying cadets were significantly different(P<0.05). There were 87.2% students of Grade One and 93.3% students of Grade Two taking less than or equal to 6h to get daily reading and learning time, 34.2% students of Grade One and 13.8% students of Grade Two taking outdoor sports less than or equal to 2h, 57.3% students of Grade One and 90.0% students of Grade Two taking more than One category of exercise,38.5% students of Grade One and 43.3% students of Grade Two using electronic production less than or equal to 2h, 85.5% students of Grade One and 75.7% students of Grade Two using electronic production at night, and 61.5% students of Grade One and 81.0% students of Grade Two paying high attention to the use of scientific knowledge(P<0.05).

CONCLUSION: The contrast visual acuity of Air Force pilot cadets keeps improving at theoretical study stage, mainly including the following reasons such as the decreasing of reading time, the increasing of outdoor sports, the improving of exercise methods, the reduce using of electronic production and the enhancing of eyes-using knowledge.