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６１名小学生视力连续五年调查分析孔凡宁（黄山市卫生防疫站２４５０００）１９９７年５月，随机抽查了黄山市屯溪第七小学六年级１６１名学生连续五年的视力检查资料，进行分析。１资料来源与方法１．１资料来源随机抽查屯汐七小六年级４个班１６１名学生连续五年（１９...
Investigation and Analysis on 61 Primary Students’ Eyesight for Five Years Successfully Kong Fanning (Health and Anti-Epidemic Station, Huangshan City, 245000) In May 1997, randomly selected 161 students from the sixth grade of Tunxi Seventh Primary School in Huangshan City for visual acuity examination for five consecutive years. 1 sources and methods 1.1 sources randomly selected Tuen Xi seven sixth grade four classes of 161 students for five consecutive years (19 ...