Flying mosquitoes, as the name implies, is a shadow in front of the eyes like a mosquito and can move. The cause of mosquito flying is vitreous turbidity. The vitreous body is located inside the eye, in front of the retina, and is part of the fundus of the eye. Normally it is a colorless, clear, jelly-like substance. When the vitreous body ages with age, it changes from a jelly-like substance to a mixture of water and fibrous material, so patients see shadows that can move with the eye, mosquito-like, thread and coil-like, water ripple-like, and many other different shapes. For mild cases, the patient’s symptoms will not be too clear, generally there will be a black shadow floating in front of the eyes, like a mosquito flying back and forth in front of the eyes, but generally will not affect vision. The shadows that the patient sees on their own will actually be larger than the real substance, because these cloudy objects are inside the eye and are reflected on the retina by the light, which has a magnifying effect. Therefore, it is possible that the doctor will not be able to detect them during the examination, but only through the symptoms and other examination signs, and the specialist will be able to determine whether there are pathological changes. If it is physiological vitreous aging, this condition does not require treatment and observation is recommended so that the patient can slowly adapt to the symptoms on their own. For the more serious or patients really can not accept the symptoms, you can choose laser treatment, or even vitrectomy surgery to treat mosquitoes. In summary, mosquito flying disease is a more complex disease, only according to the patient’s specific situation to develop a detailed and individual treatment plan, so that you can have good results.