The flickering of the eyes like lightning, that is, the flashing sensation in the eyes, may be related to physiological factors, or it may be caused by pathological reasons such as fundus retinal diseases. 1. Physiological factors: Commonly found in the elderly, along with the gradual increase in age, some people will experience vitreous liquefaction contraction, resulting in vitreous volume reduction, resulting in the vitreous posterior border membrane from the retina peeling, in the process of peeling, it will form a certain retinal pull, thus causing the patient’s eyes to appear flashing sensation. 2. Fundus retinal disease: retinal detachment, retina proliferation membrane and other lesions, so that the patient’s retinal cells are stimulated, resulting in flashes of light in the eyes, which can also be accompanied by vision loss and other symptoms. It is recommended that patients with flashes of light in their eyes should seek medical attention to evaluate their condition and follow the doctor’s instructions for treatment.