Patients with flickering sensation when looking at the light may be caused by retinal detachment or posterior vitreous detachment, patients can follow the doctor’s instructions through laser or surgical treatment, the specific treatment mode is related to the patient’s condition. Posterior vitreous detachment patients because the detached vitreous pulls the retina, so that the retinal cell excitability increases, the patient thus appear flash sensation, generally do not need special treatment, if there is a retinal hole, feasible retinal laser treatment. Patients with retinal detachment may also experience flashes of light in front of their eyes, as well as loss of vision and dark shadows in front of their eyes. Surgical treatments, such as retinal reset, can be performed to reset the detached retina and improve the patient’s discomfort. It is recommended that patients with significant flashes of light should seek prompt medical attention to evaluate their condition and follow the doctor’s instructions for treatment.