Myopia of 500 degrees is classified as moderate myopia in terms of classification criteria. Therefore, if an adult has 500 degrees of myopia, the problem is usually not too serious and the vision can be maintained in a normal range as long as the glasses are worn accurately. However, in the case of children, the younger they are, the greater the severity. Because the degree of myopia gradually increases with age, a premature myopia of 500 degrees is bound to become more severe as the child grows older. This can become pathological myopia, which can have a very noticeable effect on the eyes. Therefore, it is important to pay attention to myopia in children, go to the hospital for an early optometry examination and wear glasses. In addition, it is important to maintain reasonable and correct eye habits and to increase outdoor time appropriately in order to control the speed of myopia development.