In principle, myopia glasses, especially those with a high degree of prescription, are recommended to be worn all the time. If the degree of myopia is less than 50 degrees and the requirement for near vision is not high, the glasses can be removed appropriately. The purpose of wearing eyeglasses is to correct refractive error, after wearing eyeglasses, the eyes will be able to see a clear image, for children and teenagers who already have more than moderate true myopia, if they do not wear eyeglasses, it will easily lead to eye fatigue, myopia deepening. If the refractive error is caused by high myopia or astigmatism, glasses should be worn all the time to correct it, to avoid visual fatigue as effectively as possible, and to prevent myopia and astigmatism from worsening. If you find that your vision starts to blur and you have difficulty seeing, you need to go to the ophthalmology department of the hospital, undergo medical optometry, and the doctor will decide whether you need glasses.