If the prescription glasses are too high, it will produce symptoms such as dizziness, blurred vision, visual fatigue, and feeling the shape of the object, which is easier to judge. If the glasses prescription is slightly high, for example, 300 degrees of myopia and the prescription is 325 or 350 degrees, some people will not feel it because the human body has a compensatory function. Therefore, people who suspect a high degree of glasses must go to the hospital for accurate medical optometry and compare the degree of optometry with the degree of glasses in order to judge. If the difference between the new optometry result and the original glasses is more than 50 degrees, it is recommended to replace the glasses. If the difference is not more than 50 degrees, it is recommended to continue to wear the original glasses and review them in about 3 months. In fact, eyeglass fitting is a medical activity, so it is recommended that patients go to a regular hospital for relevant examinations to clarify the prescription and then give the prescription, so that the prescription of eyeglasses can be accurate. If you go to an optical store or medical institution that does not have the medical qualification, once the prescription is not allowed, the degree of glasses is not suitable, whether too big or too small, it is easy to cause refractive error, the degree of deepening too fast, causing more damage to the eyes.