近视眼一般多发生在7～17岁的学龄期儿童和青少年,除少数近视眼,特别是一些高度近视与遗传因素有一定的关系外,大多数的近视眼都是由于不注意爱护眼睛所造成的。那么,近视眼到底是怎样发生的呢?眼睛好象是一架照像机,只有焦距合适,才能拍出清晰的照片。人在视物时,物体只有在视网膜上形成清晰的影像,人们才 Myopia generally occurs in school-age children and adolescents aged 7 to 17, with the exception of a few myopia, especially some high myopia and genetic factors have a certain relationship, the majority of myopia are due to careless eyes caused by the eyes of. So, what exactly happens to myopia? The eye seems to be a camera, only a suitable focal length, in order to take a clear picture. People in the material, the object only in the retina to form a clear image, people just