Myopia of 700 degrees is considered high myopia, which can be treated by laser surgery correction or IOL implantation for crystalline eyes. The severity of myopia is categorized according to the degree of myopia, myopia above 600 degrees is high myopia, currently the patient has 700 degrees of myopia, which has reached the standard of high myopia, and if the patient wants to improve it, the main way to correct it is through surgery, which is suitable for adult patients. If the corneal condition of the patient allows, laser surgery can be performed to correct the myopia. If the corneal condition of the patient is limited and laser surgery cannot be performed, posterior chamber IOL implantation in crystalline eyes can also be performed to treat the myopia. If the patient does not want to undergo surgical treatment, or if he/she is not old enough to reach the age of majority, he/she can be corrected by wearing eyeglasses.