论文部分内容阅读
目的 探讨频闪与视疲劳的关系，寻找减轻船员视疲劳的方法。方法 观察３０名被试者在两种不同的照明电光源下，阅读６号字体的文章６０ｍｉｎ前后的常规视力、对比视力（对比度为９２％，５２％，３０％，１１％）、对比敏感度（空间频率为１．２，２．４，４．８，９．６，２０，３６周／度）。结果 被试者在视觉负荷量相同的情况下，他们的常规视力、对比视力、空间频率在高频处的对比敏感度均下降，下降幅度在使用有频闪交流荧光灯时比使用无频闪直流荧光灯时大。右眼常规视力下降相差０．０４，左眼常规视力下降相差０．０４（均Ｐ＜０．０１）。右眼对比视力在相应对比度处下降分别为０．０６，０．０４，０．０４，０．０７（Ｐ值分别为＜０．０１，＜０．０５，＞０．０５，＜０．０１），左眼对比视力下降分别为０．０４，０．０５，０．０８，０．０７（Ｐ值均＜０．０１）。当空间频率在２０ｃｐｄ时，对比敏感度值下降１７．３（Ｐ＜０．０１），在３８ｃｐｄ时下降６．１９（Ｐ＜０．０１），均有统计学意义。结论 频闪对人的视功能影响较大，使用无频闪照明电光源是一项改良船舶舱室光环境的有效措施。
Objective To explore the relationship between strobe and visual fatigue and find ways to reduce the visual fatigue of seafarers. Methods 30 subjects under the two different illumination electric light source, reading the 6-character essay before and after 60min routine vision, contrast (92% contrast, 52%, 30%, 11%), contrast sensitivity (Spatial frequency of 1.2,2.4,4.8,9.6,20,36 weeks / degree). Results Subjects under the same visual load, their routine visual acuity, contrast vision, spatial frequency contrast sensitivity decreased at high frequencies, the decline in the use of flicker AC fluorescent lamp than the use of flicker-free DC Fluorescent light big. The difference of visual acuity between the right eye and the left eye was 0.04 and 0.04, respectively (all P <0.01). Right eye contrast decreased at the corresponding contrast at 0.06,0.04,0.04,0.07 (P values were <0.01, <0.05,> 0.05, <0.01 ), Left eye visual acuity decreased 0.04,0.05,0.08,0.07 (P values were <0.01). Contrast sensitivity decreased by 17.3 (P <0.01) at spatial frequency of 20 cpd and decreased by 6.19 at 38 cpd (P <0.01), both of which were statistically significant. Conclusion The stroboscopic effect on human visual function is greater. The use of stroboscopic illumination source is an effective measure to improve the light environment of the ship’s cabin.