Recovery from the treatment of posterior vitreous detachment is difficult and the surgery is difficult. However, before sexual detachment, it is important to take precautions. When posterior vitreous detachment occurs, the tissue around the optic nerve is torn off and floats in the vitreous, starting as a ring-shaped cloudy object, which can later form an oval shape, or merge in the middle to form an “∞” shape, while the dotted line floating object increases. The incidence of posterior vitreous detachment caused by aging vitreous degeneration increases with age, according to statistics, the incidence of posterior vitreous detachment is 53% at the age of >50 years, and increases to 65% at the age of >65 years. Patients with posterior vitreous detachment should not overexert their eyes, lift heavy objects or do strenuous activities to prevent the occurrence of myopia. Patients who suffer from myopia should go to the hospital for regular checkups, especially for myopic patients with poor fundus, to prevent eye trauma. After the vitreous detachment of light, bed where a few days, pay attention to the lying position, eat more fruits, vegetables, light diet, do not chew hard things, keep the bowel movement smooth, after the vitreous detachment of some can be reset. The heavier the vitreous detachment, must be surgical treatment, the sooner the better, as long as the above-mentioned net off the symptoms, should immediately go to the hospital for examination, diagnosis and treatment. In confirming the diagnosis, in addition to relying on its clinical manifestations, it is also necessary to use auxiliary examinations. The examination of posterior vitreous detachment in this disease is based on clinical manifestations, fundus examination and ocular ultrasound to make a clear diagnosis. This disease seriously affects the daily life of patients, so it should be actively prevented.