近视是随着社会文明的发展而带来的疾病。目前世界各国近视的发病率相当高,如日本近视约占总人口的50％,苏联约占总人口的25％。在我国,据调查,在学生的视力不良中,近视所占的比重大致为:小学生50％—60％,中学生占70％—90％,大学生占90％以上。近年来,近视的发病率还有明显增加的趋势。现从两个方面谈谈近视的形成。 Myopia is a disease that comes with the development of social civilization. At present, the incidence of nearsightedness is quite high in countries around the world. For example, myopia in Japan accounts for about 50% of the total population, and the Soviet Union accounts for about 25% of the total population. In China, according to the survey, in the poor vision of students, the proportion of myopia is roughly: 50%-60% of primary school students, 70%-90% of middle school students, and 90% of university students. In recent years, there has been a clear increase in the incidence of myopia. Now from two aspects talk about the formation of myopia.