The floaters seen in the eye are generally linear, dotted black, with the eye rotation with a sense of floating, common is vitreous turbidity, due to congenital, myopia or trauma, after the bump and fundus disease can lead to vitreous liquefaction loss, loss of transparency, become cloudy, so the eyes will see objects in front of the amplitude of the black shadow obscuring the floating sense. Mild cases called mosquitoes, serious cases if the cloudy fundus bleeding leads to blood cells floating, or fundus disease, inflammatory cell proliferation-like changes lead to cloudy obvious. In a short period of time the cloudy floating sensation significantly aggravated, and even affect the vision, need further examination and treatment in the ophthalmology.