The flashing sensation in the corner of the eye is caused by the vitreous pulling on the retina, which requires resting and avoiding eye vibrations. When the vitreous degenerative disease will appear vitreous clouding, there will be small flies floating symptoms in front of the eyes, is often referred to as flying mosquitoes, if the flying mosquitoes symptoms worsen, while vision loss, we recommend that the hospital dilated pupil examination fundus, to see whether there is fundus hemorrhage and whether the vitreous pulling the retina caused by fissures. If the retina has a fissure should be treated in time to avoid more serious vision damage, if there is indeed a hemorrhage in the fundus, we should try to find the cause of symptomatic treatment. Physiological vitreous clouding is a normal degeneration and can be left untreated and observed for changes.