Objective To analyze the stability of uncorrected visual acuity(UCVA)of the civil flying cadets after corneal refractive surgery,and to investigate the rationality of the recruitment standard of civil flying cadets after corneal refractive surgery.Methods The medical records of civil flying cadets who had undergone corneal refractive surgery and participated in physical examination for civil aviation recruitment from October 9th,2017 to March 10th,2019 were selected,including surgical methods and preoperative refractive equivalent spherical degree.Those who met the inclusion criteria were followed up for 3 years(once a year),and their UCVA was measured annually and routine ophthalmic examination was performed.Landolt notched ring visual acuity chart was used to measure the UCVA.The civil flying cadets were grouped according to surgical methods,postoperative observation time,preoperative diopter and postoperative remaining corneal thickness.Kruskal-Wallis test and Wilcoxon test were used to compare the changes of UCVA between the recruitment and the follow-ups.Results A total of 125 qualified flying cadets(240 eyes)treated by corneal refractive surgery were recruited.At the third year of follow-up,21 eyes(8.75%,16 cases)of the treated eyes had UCVA<0.9 and 3 eyes(1.25%)had spherical equivalent degree greater than-0.5 D.Compared the UCVA in recruitment with that at the third year of follow-up,the laserin situ keratomileusis group,the observation time<3 years group,the preoperative diopter-3.0-≤-4.5 D group and the residual corneal thickness 460-≤490 μm group showed significant differences(Z=2.90,2.82,2.28,3.35,P=0.004,0.005,0.023,0.001).Conclusions The flying cadets treated by corneal refractive surgery could be conditionally recruited if the side influence factors are controlled and their UCVA remains good stability.
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