Retinal detachment is the separation of the retinal neuroepithelium from the retinal pigment epithelium, which in layman’s terms means that the retina has left its physiological anatomical position. If a retinal detachment is diagnosed in the hospital, the cause of the detachment needs to be investigated and treated, and early retinal reattachment surgery is required. Retinal detachment is categorized according to its cause into pore-derived retinal detachment and non-porous retinal detachment. The latter is further categorized into detached and exudative retinal detachments. Therefore, if the patient suddenly notices the symptoms of floaters, flashes of light in front of the eyes, and obvious blocking sensation, and vision loss of varying degrees, he/she needs to go to the hospital as soon as possible for a detailed examination. After the diagnosis of retinal detachment is confirmed, it is usually necessary to examine the peripheral part of the fundus to find out the entire hole. If the retinal detachment is diagnosed as a foraminal detachment, early retinal restoration surgery should be performed. The key to the surgery is to close all the holes by photocoagulation and condensation during the operation to achieve retinal reset. Retinal detachment with pulling is usually associated with diabetic retinopathy, retinal vascular occlusion, and severe trauma to the retina, and often requires vitrectomy in combination with retinal resurfacing surgery. Exudative retinal detachment, need to find the cause of the disease, for the treatment of the primary disease, the more common are uveitis and retinal choroidal tumors, or systemic diseases, such as severe malignant hypertension, hypertension in pregnancy caused by lesions. Therefore, retinal detachment is a disease that seriously affects vision, and the damage to vision can be irreversible. Therefore, it should be treated at the ophthalmology department of the hospital as soon as possible.