Eight hundred degree myopia belongs to high myopia, usually we should pay attention to avoid strenuous activities, because the excessive elongation of the eye axis in high myopia causes degenerative changes in the fundus, and strenuous activities can easily lead to the formation of retinal detachment and retinal fissures in the fundus of the eye. For the treatment of high myopia of 800 degrees: 1. develop proper reading habits and pay attention to balanced nutrition to prevent further myopia. 2. consider wearing glasses. The prescription can be determined by precise optometry, and then optometry can be considered with frame glasses or contact lenses. 3. Surgery can be adopted. There are two main types of surgical treatment: one is excimer laser surgery, which can be divided into full femtosecond laser surgery, femtosecond laser combined with excimer laser surgery and full excimer laser surgery; in addition, IOL implantation for crystalline eyes is also available.