At present, a large part of domestic students are myopia, especially middle school students accounted for more than 70％, and the community appears more than a single vision protection,can only unilaterally control the reader's eyes to the distance of the book,aspects of the full range of protection of vision. In response to this problem, we designed a new type of vision protection,from reader to reading distance,light and time three aspects,a comprehensive protection of the reader's eyes. The use of single-chip control ranging,light and time of the three parts, each part complement each other,from different aspects to achieve the effect of protecting eyesight,so that the eyesight of high school students no longer suffer from myopia,early removal of glasses.%目前国内学生有很大一部分都是近视眼,尤其是中学生占到了70％以上,而社会上出现的视力保护器都比较单一,只能单方面地控制读者眼睛到读物的距离,并不能从各个方面全方位的保护视力.该文设计制作了一款新型的视力保护器,它从读者到读物的距离、光线和时间3个方面,全面地保护读者眼晴.利用单片机控制测距、光线和时间3个部分,每个部分相辅相成,从不同方面达到了保护视力的效果,使中学生的视力不再受近视眼的困扰,早日摘掉眼镜.
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