First of all, once a child is truly myopic, no matter whether they wear glasses or not, with the study of eye and environmental factors, myopia will deepen to varying degrees from year to year; secondly, some of the children who wear myopia glasses, wear glasses with improper eye habits and posture, the use of the wrong method will also cause myopia to deepen. A pair of myopia glasses just in a certain period of time to help children see things clearly, but can not once and for all to prevent myopia deepening, many children do not have a regular review, did not replace the appropriate degree of glasses in a timely manner, the long-term use of low myopia glasses, but easy to increase the visual fatigue, myopia deepening faster, so the children’s myopia deeper and deeper is not caused by wearing glasses.