Often encounter people say that there are dark shadows floating in front of the eyes, sometimes more and sometimes less, like flying around the small bugs, and like hair in front of the eyes, lingering, very annoying. In ophthalmology, this phenomenon is called “flying mosquitoes”, it is because the vitreous humor in the eye has different degrees of cloudiness caused. The normal vitreous body is such as egg-white transparent colloid, filled in the eye four-fifths of the volume, usually colorless and transparent, containing 99% water and a small amount of protein, etc., light can be unobstructed through. When the vitreous occurs cloudy, there will be dark shadows fluttering in front of the eyes. The causes of “flying mosquitoes” are myopic, senile, traumatic, hemorrhagic, inflammatory. A, myopic and senile vitreous clouding: This is a vitreous degeneration caused by the clouding. With age or myopia, the nature of the vitreous body will change from a gel state to a liquefied state, and the vitreous body will separate from the retina to form a posterior vitreous detachment. In people’s vision, they may see a dotted, flocculent cloudiness floating in front of their eyes, which is translucent, more obvious on a white background and in bright places, and floating with eye movements. It is more common in the elderly and highly myopic eyes, and can remain unchanged for a long time without affecting vision. Therefore, there is no need to be too nervous. For treatment, you can order aminopeptide iodine eye drops, take Volitene tablets (contraindicated for hyperthyroidism), or take some herbs that help absorption, and eat more amaranth and other vegetables. Inflammatory clouding: such as uveitis, retinitis, iridocyclitis, etc., inflammatory exudate into the vitreous body caused. The degree of clouding is related to the severity and extent of inflammation. Symptoms are also dots, flakes, flocculent, filaments, dust-like floating in front of the eyes, and more, larger, opaque, treatment should be based on the treatment of the primary eye disease to reduce inflammation, and then with the aforementioned absorption drugs. Third, hemorrhagic clouding: hypertension diabetes and other possible complications of fundus lesions, the occurrence of fundus hemorrhage, into the vitreous caused. Mild cases can appear the aforementioned flying mosquito symptoms, severe cases of multiple hemorrhage resulting in serious vitreous clouding, vision loss. Treatment is still based on the primary disease, together with absorption drugs such as intramuscular injection of Antoine and Chinese herbal medicine to promote absorption. Severe vitreous hemorrhage clouding must be treated surgically. Fourth, traumatic clouding: eye trauma can cause intraocular hemorrhage, causing vitreous clouding; eye trauma can make intraocular foreign body retention, such as the presence of iron, copper rust, early also appear flying mosquito symptoms, late vision severely diminished. To diagnose the nature of this clouding is not difficult, the treatment is also for the primary eye disease, more than the need for surgical treatment. Fifth, other causes of vitreous turbidity: If the flying mosquito symptoms accompanied by a sense of flash, may be the vitreous and retinal adhesions pull, should be given great attention. Patients must go to the eye hospital to check, there is no aura of retinal detachment. Some patients have a sudden increase in the number of flying mosquitoes in front of their eyes, and there is a dark shadow like a curtain covering the corner of the eye. Dr. Yang Xun reminded, at this time should dilate the pupil for detailed fundus examination, such as the discovery of retinal fissure can be timely laser treatment; such as the discovery of retinal detachment, you need surgery.