CAJ | 학술논문

目的观察军事直升机飞行学员在暗环境下不同对比度时的视力和反应时间的变化情况. 方法应用多功能电子视力测量仪(MFVA-100)检查42名(84眼)直升机飞行学员在暗环境中不同对比度(100％、25％、10％、5％)时左右眼的logMAR视力和反应时间.采用SPSS 16.0统计软件进行计量资料的单因素方差分析、配对t检验及相关分析. 结果在对比度为100％、25％、10％、5％时的平均logMAR视力右眼分别为0.007±0.141、0.256士0.162、0.453士0.182、0.711±0.232;左眼分别为-0.017±0.137、0.266±0.144、0.434±0.145、0.697±0.176.随着对比度的下降,视力呈下降趋势.左右眼在相同对比度下的视力差异无统计学意义(P＞0.05).100％对比度下的视力与25％、10％、5％对比度下的视力均呈正线性相关(r=0.432～0.626,P＜0.05).随对比度下降,反应时间略有延长.对比度为100％、25％时左右跟之间反应时间差异无统计学意义(P＞0.05),对比度为10％、5％时右眼反应时间比左眼延长(t=2.355、2.055,P＜0.05). 结论本研究客观反映了军事直升机飞行学员的不同对比度时视力和反应时间的变化情况,可为今后招飞体检以及飞行人员常规体检时评估视功能提供参考依据.
목적 관찰군사직승궤비행학원재암배경하불동대비도시적시력화반응시간적변화정황. 방법 응용다공능전자시력측량의(MFVA-100)검사42명(84안)직승궤비행학원재암배경중불동대비도(100％、25％、10％、5％)시좌우안적logMAR시력화반응시간.채용SPSS 16.0통계연건진행계량자료적단인소방차분석、배대t검험급상관분석. 결과 재대비도위100％、25％、10％、5％시적평균logMAR시력우안분별위0.007±0.141、0.256사0.162、0.453사0.182、0.711±0.232;좌안분별위-0.017±0.137、0.266±0.144、0.434±0.145、0.697±0.176.수착대비도적하강,시력정하강추세.좌우안재상동대비도하적시력차이무통계학의의(P＞0.05).100％대비도하적시력여25％、10％、5％대비도하적시력균정정선성상관(r=0.432～0.626,P＜0.05).수대비도하강,반응시간략유연장.대비도위100％、25％시좌우근지간반응시간차이무통계학의의(P＞0.05),대비도위10％、5％시우안반응시간비좌안연장(t=2.355、2.055,P＜0.05). 결론 본연구객관반영료군사직승궤비행학원적불동대비도시시력화반응시간적변화정황,가위금후초비체검이급비행인원상규체검시평고시공능제공삼고의거.
Objective To investigate the variation of visual acuity (VA) and reaction time at different contrast levels under dark environment in military helicopter flight cadets.Methods Fortytwo military helicopter flight cadets (84 eyes) with normal VA were enrolled.LogMAR VA and reaction time were measured at 4 contrast levels (100％,25％,10％,and 5％) under dark environment by multi-functional visual acuity tester (MFVA-100).ANOVA,paired-simples t-test,and linear regression analysis were used by SPSS 16.0 to analyze the data.Results LogMAR average VA of right eye at 100％,25 ％,10 ％,and 5 ％ contrast levels was 0.007± 0.141,0.256 ± 0.162,0.453±0.182 and 0.711 ±0.232 respectively.LogMAR average VA of left eye at 100％,25％,10％,and 5％ contrast levels was-0.017±0.137,0.266±0.144,0.434±0.145 and 0.697±0.176 respectively.VA decreased gradually with the decrease of contrast level.VA was no statistically significance between right and left eyes at same contrast level (P＞0.05).VA at 100％ contrast showed positive linear correlation to the visual acuity at 25％,10％,5％ contrasts respectively (r =0.432-0.626,P＜ 0.05).Reaction time slightly increased with the decrease of contrast level.Reaction time was no statistically significance between right and left eye at 100％ and 25％ contrast levels (P＞0.05),but the reaction time of right eye was longer than that of left eye at 10％ and 5％ contrast levels (t =2.355,2.055,P＜0.05).Conclusions The study result objectively indicates the situation of contrast visual acuity and reaction time in military helicopter flight cadets and would provide reference to the assessment of visual function in the selection of aviation cadets and the examination of pilots.