1, no need to re-fit glasses: if the adult myopia has increased by 50 degrees, but the patient wears the original glasses, the naked eye vision can reach 1.0. In this case, it is not necessary to change glasses for the time being, because the patient's vision 1.0 after wearing the original glasses is considered to be good and up to standard, and follow-up observation can be carried out, and the patient can be informed to check regularly. If the glasses are damaged and the lenses are badly worn, you can consider replacing them again. In daily life, adults should also pay attention to the habit of using eyes, try to avoid eye fatigue, reduce the time of using eyes at close range, so that eyes can be fully relaxed and rested, and avoid the aggravation of myopia. 2. Need to re-fit glasses: For teenagers and children, if the myopia degree is increased by 50 degrees, whether it is naked or corrected, the vision will also decrease obviously, especially if the corrected vision does not reach 1.0 or 1.0, it is recommended to replace the glasses in time. If the myopia degree increases by 50 degrees and the glasses are not changed in time, the eyes will be easily tired, and the ciliary muscles will be in a state of spasm, fatigue and adjustment for a long time, which will easily increase the myopia degree faster and deeper. Therefore, it is recommended to replace the glasses in time, that is, to re-equip them.