Generally speaking, when myopia exceeds 100 diopters or more, glasses should be worn to correct it. The severity of myopia is based on the degree of myopia, the higher the degree of myopia, the more severe it is and the greater the impact on vision. Generally, myopia within 100 degrees has a relatively small impact on the patient’s naked eye vision, and if the patient does not have high fine vision requirements, he/she can temporarily not wear glasses for correction, while myopia over 100 degrees will have a more obvious impact on the patient’s naked eye vision, and he/she should wear glasses for correction, or else it is easy to pay more attention to the visual fatigue, which will result in the continued growth of the myopia level. Under special circumstances, for example, even if the myopia is less than 100 degrees, but the patient has higher requirements for fine vision, glasses can also be worn for correction.