In our country, before the 1980s, the incidence of myopia is very low in students in primary and middle schools.
在我国二十世纪八十年代以前，近视的发病率很低，中小学生中为数很少。
As self-health care consciousness of students in primary and middle schools is poor, the incorrect pose while reading or watching at TV, computer for a long time can cause myopia.
中小学生自我保健意识差，阅读时姿势不正或在电视、电脑屏幕前久视，都会引起近视。
Objective: To investigate the impacts of eye care habits and vision burden on myopia among primary and high school students.
目的：了解中小学生用眼习惯与负担，探讨这些因素对近视的影响。
Cai did caution that myopia is already starting to calcify, particularly for working-class students for whom the combination of tuition and lost wages can seem too large a sacrifice.
但蔡昉说，负激励效应已经开始出现苗头，尤其是家境不太好的学生，他们会觉得学费和工资损失的代价太大。
AIM: to assess the prevalence of refractive errors in middle school students in Lanzhou city and explore the risk factors for myopia.
目的：调查兰州市中学生屈光不正的发病率并探讨近视发病的危险因素。
Objective To investigate the effect of lower degree convex lens on preventing myopia of primary school students.
目的探讨低度凸透镜预防小学生视近的效果。
Objective To investigate the effect of lower degree convex lens on preventing myopia of primary school students.
目的探讨低度凸透镜预防小学生视近的效果。
应用推荐