Vitreous bulging through the pupil into the anterior chamber is one of the clinical signs of vitreous hernia. It is commonly seen after cataract intracapsular extraction. Vitreous herniation is likely to cause corneal edema and clouding when in contact with the corneal endothelium. The following can be used for diagnosis. 1. Spherical cysts visible in the vitreous: In patients with vitreous porcine cysticercosis, the vitreous is cloudy to varying degrees, and translucent light gray or light blue spherical cysts are visible in the vitreous, often with a gray or yellow-white round spot in the center, which is the head of the cysticercus, and sometimes the cysticercus is visible writhing in the vitreous. In the early stage, there is an oval black shadow floating in front of the eye and a distorted, wriggling shadow. In the late stage, due to the disturbance of intraocular tissues and the formation of inflammation, vision can be significantly reduced. Even blindness. 2, non-vitreous lesions in front of the eye flying mosquitoes: congenital physiological flying mosquitoes is a kind of physiological flying mosquitoes. Normal people look at white objects or blue sky, can be found in front of the floating dots or filament floaters, sometimes can also see with closed eyes, but the objective examination can not find any vitreous lesions, this phenomenon is called physiological mosquito flying disease. It is generally believed that the vitreous cortex cells or blood cells walking in the retinal blood vessels on the retina projection. 3, vitreous with blood: is eye trauma or retinal vascular disease caused by a common complication of vision hazards, on the one hand, hemorrhage not only makes the refractive medium cloudy, preventing light from reaching the retina, and can have a serious damaging effect on the eye tissue; on the other hand, the body’s response to hemorrhage can make the blood gradually be removed. The consequences of vitreous hemorrhage vary greatly from case to case, and appropriate clinical management should be given at the right time according to the primary injury, the amount of bleeding in the off-duty body, the absorption of the bleeding and the performance of the ocular response.