根据大量的统计资料,目前我国城乡学校的学生视力不良占有相当大的比例,其中主要是近视。这不能不引起各有关部门、各级领导的重视,都来关心下一代青少年的健康成长。有人用动物进行模拟试验,长期注近视物后可以诱发近视,从而证明遗传和环境都有关系。有人提出多基因学说的设想,即认为每个个体是否发生近视,视其易患度是否超过阀值,如果超过即发生近视,而易患度是这一个 According to a large amount of statistics, at present, students in urban and rural areas in China have a large proportion of students with poor eyesight, mainly myopia. This can not but arouse the attention of all relevant departments and leaders at all levels to care for the healthy growth of the next generation of adolescents. Some people use animal simulation test, long-term injection of near-sightedness can induce myopia, thus demonstrating the relationship between genetic and environmental. Some people put forward the idea of ​​multi-gene theory, that is, whether each individual myopia, depending on whether the degree of susceptibility exceeds the threshold, if it is more than the occurrence of myopia, and susceptibility is this one