Pre-operative: 1. After admission, take the initiative to inform doctors and nurses of eye and systemic medical history, drug allergy history and treatment history, such as combined hypertension and diabetes should actively control blood pressure and blood sugar. 2.Do laboratory tests such as blood sampling, which are usually performed on an empty stomach. 3.Do the general examination and related specialist examination, talk and sign. 4.Do pre-operative cleaning work (such as washing hair, bathing, etc.), ensure sleep and prevent cold. 5.Prepare well for surgery on the day of surgery: wear surgical gown, remove metal objects and valuables from your body, relieve urine and stool before surgery, and wait for surgery. Post-operative: 1, local or systemic anti-inflammatory, hemostatic and analgesic treatment, keep the wound clean and dry. 2, avoid smoking, alcohol and spicy stimulating food, eating should be light, keep the bowel movement smooth. 3.Avoid heavy physical labor and strenuous exercise, and avoid airplanes and diving for those with intraocular gas injection. 4.Continue to control blood pressure, blood sugar, etc., systemic diseases affect the recovery of the eye. 5, maintain a certain body position. Many patients with vitreoretinal disease require intravitreal injection of certain gas or silicone oil during surgery, using the surface tension of the gas and silicone oil to parietalize the retinal fissure and promote retinal repositioning.