In clinical practice, flying mosquitoes belongs to the vitreous disease, whether it can be completely cured, need to depend on the patient’s condition. The vast majority of flying mosquitoes is physiological flying mosquitoes, only a slight, a few individual black dots flying, is the normal degeneration of the vitreous body caused, generally appear in the forties and fifties after middle age, but myopia relatively high can appear earlier, high myopia can even appear in adolescents when flying mosquitoes. A few cases are pathological flying mosquitoes, can be vitreous pulling retinal fissure, retinal detachment or retinal small vessel rupture, can also be retinal vein blockage, diabetic retinopathy and other causes caused by vitreous hemorrhage. In addition, uveitis can also lead to mosquito flying. Pathological vitreous turbidity generally floating more black dots, sometimes accompanied by a bright flash or a large fixed black shadow in front of the eyes, need to go to the hospital immediately. Physiological vitreous turbidity together with the flying mosquitoes may disappear on their own, but may also persist, or disappear after a period of time reappear. Pathological vitreous turbidity requires active treatment of the disease causing vitreous turbidity, the original disease can be cured after treatment.