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1990年9月对山东省平阴县平阿山区45岁以上522名农民进行了晶体混浊情况调查,现将结果报告如下。调查对象和方法调查对象:采用随机整群抽样方法确定调查点,对该地6个村22个村民组45岁以上人群进行了调查,共查522人,其中男247人,女275人。检查方法:所有对象先在自然光线下检查裸眼视力,然后滴0.5%托品酰胺充分散瞳后在暗室内进行检查。采用斜照法加彻照法观察晶体状况,检查时嘱受检者眼球上下
In September 1990, a survey on the opacity of crystal was conducted for 522 peasants over the age of 45 in Ping’An Mountainous District, Pingyin County, Shandong Province. The results are reported as follows. Survey objects and methods Survey respondents: A random cluster sampling method was used to determine the survey points. A total of 522 people, including 247 males and 275 females, were investigated in 22 villagers groups over the age of 45 in 6 villagers groups in this village. Inspection methods: All subjects first check the naked eye visual acuity under natural light, and then 0.5% tropicamide fully dilated examination in the dark room. Strabismus method used to observe the crystal method according to the law, when asked to instruct subjects eyeball up and down