If there is always a dark shadow in the eye, it is likely that the vitreous turbidity, is the daily life of the flying mosquitoes, is often a physiological phenomenon, and vitreous liquefaction after detachment has a lot to do with. Because as we age, in the vitreous will precipitate mucopolysaccharide and other substances, these substances often lead to the appearance of dark shadows in front of the eyes. However, there is also a case of vitreous hemorrhage, the eyes will also appear black shadow, must go to the hospital to improve the relevant examination, such as eye ultrasound examination can often be seen in the presence of vitreous hemorrhage, and must do the dilated pupil of the eye to see if there is a bleeding fundus. If the vitreous hemorrhage is very severe, vitrectomy may be required. In the early stage, you can start with drugs that activate blood circulation and remove blood stasis, such as Yunnan Baiyao capsules or compound thromboxane capsules, which are still effective.