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The effects of illumination light source's frequency flicker on vision function

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Author:
No author available
Journal Title:
CHINESE JOURNAL OF NAUTICAL MEDICINE AND HYPERBARIC MEDICINE
Issue:
2
DOI:
10.3760/cma.j.issn.1009-6906.2001.02.002
Key Word:
视疲劳;照明;频闪

Abstract: 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60 min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20 cpd时,对比敏感度值下降17.3(P<0.01),在38 cpd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.

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