Variations and influencing factors of distant vision of students in two Air Force youth aviation schools in Northeast China / 军事医学

Objective To analyze the variation and influencing factors of distant vision of students during the recruitment selection and medical examination in two Air Force youth aviation schools in Northeast China in order to protect the youth aviation school students against myopia and to provide reference for interventions.Methods The distant vision of students of each grade in two schools in Northeast China was observed during the recruitment selection and during 2017 medical examination,and was statistically analyzed.The influencing factors of vision were investigated and analyzed.Results There was no statistically significant difference in the distant vision constituent ratio of students in Grade One and Grade Two during the recruitment selection and 2017 medical examination (P ≥ 0.05),but the difference was statistically significant in the distant vision constituent ratio of students in Grade Three during the recruitment selection and 2017 medical examination(P ＜0.01).There was statistically significant difference in the paired variable differences of students in each grade(P ＜0.01).The Logistic analysis result showed that reading distance and eating fruits and vegetables were the two important factors that influenced the visual acuity of the students.Conclustion The distant vision gets worse in the second semester of Grade Two,and the range of visual fluctuation is large.So regular examinations of visual acuity should be conducted and feasible measures of myopia protection should be taken to preserve hight-qnality sources of students.

Correlative study of distant vision and diopter among civil aviators in China / 国际眼科杂志(Guoji Yanke Zazhi)

AlM:To research the reasonability of current criteria on distant vision anddiopter for recruiting civil aviators in China. METHODS: The data about distant vision and diopter of 1901 aviators, including flight majors and aviators in active service participating in physical examination of Civil Aviation Flight University of China from 2006 to 2013, were collected. ANOVA and LSD were used to compare the differences between distant vision and diopter among different groups. The Spearman correlation coefficients of distant vision (≥0. 1 vs ≥0. 3) and diopter (0. 00 to -3. 00D) were calculated. RESULTS: The diopter of civil aviators in China increased with distant vision decreased. The correlation between distant vision and diopter ( 0. 00 to -3. 00D ) among distant vision≥0. 3's population (0. 4 CONCLUSlON: The current eye standard of recruiting civil aviators in China is reasonable to consider both distant vision and diopter, but the standard for distant vision is higher. Further research is proposed to explore the proper standard of distant vision that matches the diopter standard.