Ophthalmoplegia is generally caused by vitreous degeneration, a natural aging phenomenon. As we age, the vitreous body will “liquefy”, thus producing some cloudy material. Therefore, eye mosquitoes is also known as “vitreous turbidity” or “vitreous floaters”. What are the symptoms of mosquito flying eye mosquito disorder patients will often appear in front of the black spot and dark shadow, and will fly around with the rotation of the eye, what are the symptoms of mosquito flying eye disorder? As if flying mosquitoes in general, its shape has round, oval, dotted, line, etc.. Commonly, when the patient is looking at the blue sky, white walls and other brighter backgrounds, it is easier to find its presence. Ocular mosquitoes often occur in middle-aged and older people over the age of 40, highly myopic patients, and those who have had cataract surgery, others such as intraocular inflammation or retinal vascular disease patients, can also form the disease. Most of the mosquitoes is benign, or “physiological mosquitoes”, its characteristics are: if patients have mosquitoes in both eyes, it is impossible to determine which eye has mosquitoes, if after a period of time, these phenomena do not aggravate or produce changes, mosquitoes also fixed location, mostly benign. On the contrary, if the flying mosquito phenomenon occurs suddenly, and limited to one eye, the direction of mosquitoes flying and uncertain, black shadow obscuring the field of vision, poor vision, visual field loss, which are the evil signs must be noted.