The vitreous humor is a transparent gel-like tissue, clear and bright. The main component is a meshwork of collagen fibers filled with adsorbed molecules of hyaluronic acid, which stabilizes the vitreous gel and ensures that the vitreous humor and the surrounding retina are cushioned when the eye is turned or shaken. It also ensures that the visual field is clear and flawless, ensuring sharpness of vision. If there is an opaque body in the vitreous other than the normal structure, it is called vitreous opacity.
1.Mild patients many feel that the black shadow floating in front of their eyes, like flies flying. The onset of the disease is sudden, and the condition develops quickly. With the different parts and degrees of vitreous turbidity and the degree of impact on the concordance vision is not just the same. Mild clouding does not affect vision.
2, more significant clouding, common in degenerative myopia, uveitis and vitreous hemosiderosis. Patients feel a coarse and large amount of dark shadows in front of their eyes and have varying degrees of vision loss. Examination of the fundus may reveal floating clumps such as dust or thick strips of flocculent cords. In severe cases, the fundus or even the bottom of the eye cannot be glimpsed smoothly and there is no red light reflection. It is dark.
3.Inflammatory clouding: When the nearby tissue is inflamed, it is formed by white blood cell excretion and protein agglutination. It is a common manifestation of various retinal and chromatophoresis. Such as tuberculosis and syphilitic chorioretinitis, etc., fishing spirochetal uveitis, uveal brain for migrating endophthalmitis, etc.
4, hemorrhagic clouding: common in trauma, surgery, various retinal vascular diseases and blood clots.
5, degenerative clouding: seen in high myopia, retinal detachment, vitreous calcium and cholesterol deposition, etc.
6.Congenital clouding: Most of the embryonic mesenchymal tissue remains.
7.Other: such as intraocular foreign body, porcine cysticercosis, retinoblastoma, etc., can cause vitreous clouding.