众所周知,近视对青少年学生视力具有很大的危害性。据我局中小学连续三年检测视力状况,发病率逐年增加,引起广泛关注。其病因有多种因素、如遗传、解剖、用眼卫生习惯、环境、饮食、锻炼等等。近来有关人体微量元素的调查报告,临床观察日益增多。但对青少年近视方面的报导不多,某些微量元素体内含量的变化与近视的关系,还不能肯定。国外报导,体内硒、铜、锈、铬的缺少与近视有关。国内聂氏等报导 As we all know, myopia has a great harm to the sight of young students. According to our school for three consecutive years of detection of visual acuity, the incidence increased year by year, causing widespread concern. The etiology of a variety of factors, such as genetic, anatomy, eye health habits, environment, diet, exercise and so on. Recent human body trace elements of the investigation report, increasing clinical observation. However, few reports on juvenile myopia, some trace elements in vivo changes in the relationship with myopia, is still not sure. Foreign reports, the body of selenium, copper, rust, chromium and the lack of myopia. Domestic Nie’s reports