通过调查,发现中小学校学生的视力减退现象相当严重,而且还有继续发展的趋势,应引起全社会的重视。造成孩子们视力减退的原因是什么?过去我们认为是由于学生作业负担过重,照明条件不好,光线暗遭成的。通过调查分析,发现原因远不只这些,而且 Through investigations, it was found that the vision loss of students in primary and secondary schools was quite serious, and there was also a trend of continued development, which should attract the attention of the whole society. What caused the children to have vision loss? In the past, we thought it was due to the heavy workload of students, poor lighting conditions, and the darkness of light. Through investigation and analysis, we found that the reasons are far more than these, and