当前儿童近视的发病率在我国逐年上升,正严重危害少年儿童的健康。中国儿童近视率在上世纪70年代中期还较低,约占15%～20%。但现在从小城镇、中等城市到大城市都有逐步上 The current incidence of myopia in children in our country increased year by year, is seriously endangering the health of children and adolescents. Myopia rate of children in China in the mid 70s of last century is also low, accounting for about 15% to 20%. But now from small towns, medium-sized cities to large cities have gradually