The flashing sensation sometimes experienced after retinal detachment surgery is usually due to postoperative postvitreous detachment, which can be observed temporarily, and if the flashing sensation persists for a long period of time, surgical treatment can be performed. After retinal detachment surgery, patients may develop postvitreous detachment, because of the irritation caused by the pulling of the vitreous body on the retina, patients may have a kind of glittering sensation in front of their eyes, which usually disappears after the retina and vitreous body are completely separated. Some patients may have vitreous liquefaction and clouding, and the patient may also experience the uncomfortable sensation of dark shadows fluttering in front of the eyes. If the vitreous detachment can be completely detached from the retina without causing retinal pulling, patients usually do not have obvious symptoms, and can be treated without special treatment, and can be observed regularly. If the vitreous body and retina are closely connected, causing retinal pulling damage, or even retinal detachment, patients need to undergo surgery again to reset the retina. It is recommended that postoperative retinal detachment patients should follow the doctor’s instructions, have regular checkups, and consult the doctor when discomfort occurs.