Flying mosquitoes usually do not go away on their own. It is important to see an ophthalmologist promptly after suffering from mosquito flying, so that the doctor can choose the appropriate treatment plan according to the patient’s specific situation. The appearance of mosquito flying syndrome is usually directly related to damage or clouding of the vitreous humor of the eye. Its etiology includes local trauma, ageing, eye disease damage, etc. There are physiological factors that lead to miosis, such as vitreous liquefaction and posterior detachment, and pathological factors that lead to miosis, such as vitreous inflammation, degeneration and blood accumulation, as well as retinal detachment, fissures and hemorrhages. Whenever you have miosis, you need to dilate the pupil and examine the fundus carefully. If the flying mosquitoes are caused by posterior vitreous detachment, no special treatment is needed. If vision-impairing lesions are found, such as retinal detachment, fissures and hemorrhages, they should be treated promptly, while other conditions can be followed up and observed. Flying mosquitoes usually will not disappear, patients should pay attention to daily use of the eyes, to avoid exacerbating the disease due to strain, diet to eat more can nourish the eyes of food.