The flashing sensation in the eyes usually lasts for a few seconds, but it will recur, and the flashing sensation in the patient’s eyes may usually disappear only after the cause of the disease is removed. If the patient’s eyes flash sensation, it may be related to excessive eye fatigue, posterior vitreous detachment, etc., such as prolonged low head to play cell phone, play computer, watch TV, etc., usually lasts for a few seconds, but it will recur. Posterior vitreous detachment involving the retina can cause flash sensation, after the posterior vitreous detachment is complete, the cause of the disease is lifted, and the flash sensation of the patient’s eyes can disappear. Usually patients should also pay attention to reasonable eye use, reduce the frequency of eye use, avoid prolonged exposure to cell phones or computer screens, and do not overuse the eyes. If eye fatigue is caused by excessive use of the eyes, appropriate massage around the eyes can be performed to relieve the discomfort of the eyes. It is recommended that patients with obvious flashing sensation in the eyes should consult the hospital in time to assess their condition and follow the doctor’s instructions for treatment.