In diabetic retinopathy, retinal detachment, retinal vascular obstruction, severe ocular trauma and other causes of vitreous and retinopathy, the vast majority of patients require vitrectomy surgery, and postoperative vision recovery is a real concern for patients and their families before and after surgery. For this issue of vision recovery time, it generally depends first on what the vitreous cavity is filled with at the end of surgery. Generally speaking, the vitreous cavity filled during surgery can be divided into three categories: balanced saline, gas, and silicone oil. If the filling is balanced saline, then you will have good vision the day after surgery and more stable, satisfactory vision about a month after surgery. If the filling is silicone oil, you will also have some vision the day after surgery, depending on the inflammation of the eye after surgery, the severity of the fundus lesion and the presence of other problems. If the situation is satisfactory, the vision can be corrected to a certain level in about one month after surgery. If the filling is a gas, the vision is closely related to the absorption of the gas, and if it is a simple air, you will have some vision about a week after surgery. If it is an expanding gas, we have to wait until most of the gas in the eye is absorbed and the pupil area is completely covered by water, then we can gradually have some vision, about half a month after the operation. Moreover, the gas concentration, the patient’s age and the patient’s underlying disease will affect the absorption of the gas. Generally speaking, most people have to wait for about a month for the gas to be gradually absorbed, and some people have to wait until two months for the gas to be completely absorbed. Therefore, the process of vision recovery may vary considerably. All operated patients, if their recovery is relatively good, can generally achieve a more stable vision three months after surgery, at which point they can obtain more stable vision that matches the patient’s disease by wearing glasses, etc. However, for patients who did not have a cataract at the same time, they may once again gradually experience vision loss due to the gradual appearance of the cataract. That again involves the issue of cataract surgery and post-operative vision recovery. However, the recovery of vision after cataract surgery is much faster than that after vitrectomy surgery.