The distinction between pathologic and physiologic Aedes aegypti can be made from the cause of its formation, symptoms, and examination. Pathological is fundus lesion, the symptoms are more serious, there will be hemorrhage or white lumps in fundus examination; physiological is natural aging, the symptoms are less serious, and gray translucent turbidity can be seen in the examination. Pathological fovea: generally due to a small amount of hemorrhage in the vitreous cavity, or uveitis leads to the formation of white blood cells in the vitreous cavity and lead to. The patient has a short period of time, a sudden aggravation of mosquitoes, even with the flash in front of the eyes, there will be red hemorrhage in the vitreous cavity or white leukocyte clusters formed during the examination. Physiological FMS: Usually due to aging caused by vitreous clouding and appeared, in the white wall, careful search, can see filamentous or cobweb, or even small dots, dark color before the eyes floating foreign body. When examining the vitreous cavity, gray translucent turbidity can be seen. If there is any discomfort, it is recommended to go to the hospital in time.