Description of the disease: December 5, 2013, the corner of the left eye suddenly flashing white light, once a day, for about a second, three days later to the hospital for examination, the doctor gave a dilated pupil, and then check the fundus, the results are vitreous turbidity, other abnormalities were not found. I am nearsighted for more than ten years, about 700 degrees in both eyes, and flysightedness for three or four years. I would like to ask the doctor if retinal fissures and detachments can be detected by a fundus exam. Can a simple vitreous opacity also cause a flashing sensation? Do I need any more tests and treatment now, or can I just have regular checkups? Answer: Based on the description of the condition, it may be caused by partial posterior vitreous detachment, which can be clearly diagnosed by ultrasound examination. Posterior vitreous detachment is a natural physiological phenomenon, in other words, everyone will encounter it sooner or later, but vitreous liquefaction and posterior vitreous detachment occur much earlier in people with high myopia. Incomplete posterior vitreous detachment can pull on the retina as the eye turns causing abnormal retinal discharge, and this can occur as a flash in front of the eye. If there is degeneration and thinning of the retina in the area of vitreous adhesion, it can pull out the fissure and cause retinal detachment. Be careful not to do the health exercise of turning the eyeball, avoid nailing, lifting heavy objects and avoiding head shaking for 3 months. Eating some iodine-containing foods such as kelp, nori and hawthorn slices, black sesame, etc. can help.