在省卫生厅的领导下,1984年组织了省、市、县三十多个单位,125人,采用机械随机抽样的方法,在全省六个地区十二个县(市)二十四个流调点进行了盲目及低视力流行病学调查。我们采用1973年W. H. O制定的盲目及低视力标准,最佳矫正视力小于0.05为盲目;小于0.3大于或等于0.05为低视力。视力表采用国际标准视力表(表)。 Under the leadership of the Provincial Department of Health, in 1984, there were over 30 units, 125 people in provinces, cities and counties. By means of random sampling, twenty-four counties (cities) in six districts of the province Idiopathic blind and low vision epidemiological investigations. We use blind and low vision standards developed by 1973 W. H. O, the best corrected visual acuity less than 0.05 is blind; less than 0.3 greater than or equal to 0.05 for low vision. Eye chart using the international standard chart (table).