Three-year follow-up of the naked distant vision in 164 civil flying cadets treated by corneal refractive surgery

Objective To explore the effect of corneal refractive surgery and the stability of naked distant vision in the treated civil flying cadets.Methods The naked distant vision,time and method of corneal refractive surgery in 164 flying cadets,who had received the surgery for at least 3 years and acquired Class Ⅰ medical certificate in the physical examination of Civil Aviation Flight University of China,were collected and analyzed.Statistical description and repeated measurement data analysis of variance were used to analyze the change of naked distant vision in the 3 years.Results 93.90％ civil flying cadets' naked distant vision values were above 1.0 in the 3rd year after the corneal refractive surgery.The naked distant vision that corrected by different surgical method was stable (average level was higher than 1.0).There were 20 eyes' naked distant vision ＜1.0 in the 3rd year after surgery,11 of which were ＜1.0 in the 1st year and 9 eyes' dropped amplitude ＞0.1 as compared with that in the 1st year.Conclusions The effect of corneal refractive surgery is satisfied and the treated flying cadets obtain stable distant vision.More visual quality indicators are suggested and the influence of flying environment on post-surgery visiual function should be studied in further. Key words: Keratectomy, Laser;  Vision tests;  Follow-up studies;  flying cadets