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作者从日本北部地区各粘胶纤维纺丝车间随机选取338名男工人。其中接触二硫化碳的工人有289名,另外49名没有明显的二硫化碳接触史作为对照组。接触组与对照组工人的平均年龄分別是42.1岁和43.3岁,接触时间为1—27年,平均10.8年。接触组289名工人工种不同,接触二硫化碳水平在20ppm(百万分之一毫克/立方米)以上者124人为H组;接触水平低于20ppm者127人为L组;其他38名工人接触二硫化碳水平不恒定。所有被检者双眼均充分散瞳,用直接眼底镜观查。如发现视网膜异常,进而作眼底彩色照像,
The authors randomly selected 338 male workers from each viscose fiber spinning workshop in northern Japan. Among them, 289 were exposed to carbon disulfide, and another 49 had no history of exposure to carbon disulfide as a control. The average age of workers in contact group and control group were 42.1 years and 43.3 years respectively, and the contact time ranged from 1 to 27 years with an average of 10.8 years. The exposure group consisted of 289 workers of different occupations, 124 exposed to levels of carbon disulfide above 20 ppm (parts per million milligrams per cubic meter), Group H, 127 exposed to exposure levels of less than 20 ppm and 38 exposed to the level of carbon disulfide Constant. All subjects were fully dilated eyes, with direct ophthalmoscopy. If found abnormalities of the retina, and then make fundus color photography,