The flashing sensation in the patient’s right eye may be caused by excessive eye fatigue, and may also be related to retinal irritation, vitreous pulling, etc., which needs to be taken seriously. The flashing sensation is a typical manifestation of vitreous liquefaction and posterior detachment. With ageing or the progression of myopia and other eye diseases, the vitreous body of the patient will liquefy, and posterior detachment will occur. When this happens, patients need to avoid strenuous exercise, do not overuse the eyes, and go to the hospital in time for examination. If only occasional flashing sensation, may be excessive eye fatigue, this need to rest immediately, away from cell phones, computers and other electronic products. If the patient’s eyes repeatedly, this situation may be caused by disease, such as diabetes patients will appear eye tissue damage resulting in retinopathy, such as proliferation of fibrous membrane pull retina, retinal detachment, etc., which can also lead to the patient’s eyes flash sensation. It is recommended that patients with obvious foreign body sensation in the eyes should consult a doctor in time to assess their condition and follow the doctor’s instructions for treatment.