In the recent outpatient clinic, I found that several patients did not pay attention to the phenomenon of flying mosquitoes in front of the eyes, and they did not think it would affect their vision, but when they came to the clinic, they found that the retina had fissures and the retina had detached, so they had to be treated surgically. Once the retinal detachment is not treated in time, the vision will be greatly affected after healing. When asked what exactly, one of the situation caught my attention, the patient said: listen to others say is “flying mosquitoes”, nothing to treat. Therefore, it is necessary to present to everyone clear, flying mosquitoes can not be taken lightly. Flying mosquitoes: generally caused by vitreous degeneration, vitreous degenerative changes in the signs, is due to the vitreous “liquefaction”, consciously in front of the eyes with flying mosquitoes, fly-like or black dots with the eye movement and fluttering, as if flying mosquitoes, so named. It occurs mostly in highly myopic, middle-aged and elderly people. Long-term stay up late, eye fatigue will also cause. Flying mosquito syndrome is divided into physiological and pathological. Physiological mosquitoes generally do not affect vision, in bright light feel obvious dots, lines, filaments, ring-shaped transparent things floating, most of them are caused by vitreous liquefaction, check the retina is normal, this kind of mosquitoes is benign, called physiological mosquitoes, regular observation can be. Pathological flying mosquitoes to pay great attention to, it is usually vitreoretinal disease caused by pathological flying mosquitoes often manifested as: consciousness in front of the flash, lightning sense; sudden appearance of the black spot in front of the eyes, or other shapes of floating objects; visual field has a partial or full obscuration, blurred vision. Common causes are: 1, posterior vitreous detachment: there are transparent or translucent or black dot-like objects floating in front of the eye with the eye movement, check the fundus may have vitreous hemorrhage or vitreous clouding, if not cause retinal fissure can not be treated, this situation is common in the middle-aged and elderly; 2, retinal fissure: simple retinal fissure, can perform fundus laser closure fissure; if there is retinal detachment will have to operate 3, fundus hemorrhage: common in patients with diabetes, hypertension and trauma, to check the fundus in detail and control blood sugar, blood pressure; 4, choroidal disease: this situation is often due to inflammation caused by vision loss need to consult; 5, early cataract occasionally will also have this situation, routine eye examination can be clear; Whatever the cause of pathological mosquitoes must pay great attention to, to timely go to the eye Check, if necessary, dilate the fundus, see if the retina has a crack or degeneration area, if necessary, timely play fundus laser or surgery. Avoid the occurrence of retinal detachment or other serious complications.