100 degrees of myopia is considered low myopia and it is recommended that glasses can be prescribed and worn when necessary. Myopia is generally classified as mild, moderate, or high according to the degree (degrees) of myopia. Every 300 degrees is a ladder, i.e. 0-300 degrees is mild, 300-600 degrees is moderate, and over 600 degrees is high. Glasses are a tool to help the eyes see, and regardless of the degree of myopia, wearing glasses for a long period of time will not in itself cause myopia to deepen. For moderate and high myopia, it is necessary to wear glasses for a long time, otherwise the long time blurred vision causes eye fatigue caused by continuous adjustment of the eye, but it is easy to cause the degree of deepening or even amblyopia. For people with mild myopia, because the degree is shallow, most of the cases can see clearly around the things, you can not need to strictly wear glasses for a long time. However, it is still recommended to carry glasses and wear them when needed. Patients with mild myopia just need to make sure that they avoid excessive eye habits such as squinting and blinking hard, and wear glasses in time when they have trouble seeing clearly to avoid eyestrain caused by excessive eye use, which in turn can cause myopia to deepen. In summary, glasses are a tool to help see objects clearly and reduce the burden on the eyes of myopic patients, and will not cause the degree of deepening, but excessive use of the eyes can lead to myopia deepening, so 100 degrees of myopia patients do not need to wear glasses all day, but need to wear them when the vision is unclear, and to avoid squinting, blinking and other excessive eye habits.