Visual acuity of 0.07 on day 2 after retinal detachment may be caused by intraoperative retinal hemorrhage, silicone oil filling, heavier postoperative intraocular reaction, and impaired visual function. 1. Intraoperative retinal hemorrhage. In the process of surgery, there is a possibility of retinal hemorrhage. As a result, it can affect the postoperative vision. As the hemorrhage is absorbed, vision will improve. 2. Silicone oil filling. If the surgical procedure chosen is vitrectomy, silicone oil filling may be chosen after the operation, and the corresponding eyes are in a state of high hyperopia and blurred vision occurs. 3. Heavy postoperative intraocular reaction. Intraocular reaction is present on the 2nd day after most internal eye surgeries, which is heavier and can affect vision. Vision will improve with recovery. 4. Impaired visual function. Since the extent of retinal detachment involves the macula, it may lead to severe impairment of visual function, and even after surgery, the same visual acuity cannot be restored. The exact cause needs to be clarified by the patient’s doctor.