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为了解学生近视眼发病情况,提供防治依据,我们于1981年3-5月对沂水县16所学校7024名学生作了视力普查,并对不同类型教室的采光照明及桌椅进行调查,现报告如下。调查方法一、视力调查1. 视力检查:采用“E”字形国际标准视力表,悬挂高度以1. 0行视标与多数受检者双眼平行,每天上午十点至下午四点测视力,受检者距视力表五米,两眼分别检查,
In order to understand the incidence of myopia in students and provide the basis for prevention and treatment, we conducted a visual census of 7024 students from 16 schools in Yishui County from March to May 1981, and investigated lighting and tables and chairs for different types of classrooms. The report is as follows. Survey method 1, visual acuity 1. Visual examination: the use of “E” -shaped international standard visual acuity chart, the height of the suspension to 1. 0 line as standard with the majority of subjects eyes parallel to each day from 10 am to 4 pm measured vision, by The examinee five meters away from the eye chart, two eyes were examined,