The flashing sensation that remains after the eye has undergone laser surgery is usually due to reasons such as posterior vitreous detachment or vitreous liquefaction. It is difficult to eliminate the symptoms, patients need to pay attention to regular fundus examination and avoid strenuous exercise. The flashes of light in the eyes are usually caused by vitreous liquefaction or vitreous detachment pulling and stimulating the retina. Neither laser surgery to correct myopia nor laser surgery to eliminate vitreous clouding can remove the flashes of light. There is no effective way to completely remove the flashes of light, but patients should avoid strenuous exercise and eye trauma to avoid vitreous pulling on the retina, resulting in retinal tearing and the formation of foramen ovale retinal detachment. In addition, patients should also conduct regular fundus examination, if found that the retina because of vitreous pulling and the formation of cracks, should be timely intervention through fundus laser treatment, surgical treatment and other ways, so as not to affect the vision.