Under normal circumstances, the glass in small cells, no blood vessels, slow metabolism, with a high degree of transparency. Vitreous opacity, vitreous disease is one of the main performance. We will generally large or larger as the turbidity of rational vitreous opacity. Mainly the following categories:
The first category is congenital turbidity.
For the embryonic development of the abnormal residues, and more can be felt in childhood.
The second category is internal and turbidity.
Vitreous itself from the degeneration caused, there are three, first hole of a posterior vitreous posterior vitreous detachment, and patients often have an immediate ring of Heiying, patients with high myopia Most of the second is the star of the vitreous, the elderly Male Most of the third kind-called because of vitreous liquefaction, and atherosclerosis may, hypercholesterolemia, and so on. Degeneration of the three visual effects are not great.
The third category is external causes of haze.
Such visual effects are often muddy, and can lead to lesions in vitreous surrounding tissue. Common are:
(1) vitreous hemorrhage. The most common. Vitreous itself without blood vessels, who are external bleeding, particularly in the retina of the great vessels, hypertension, diabetes, retinal vein Cypriots, and so common in the elderly, are also common causes of injury. Hemorrhage such as long-term absorption, can occur machine, proliferation, leading to retinal detachment of traction.
(2) glass in inflammatory exudate. Common in uveitis, purulent eye inflammation, sympathetic ophthalmia, Mei Duxing chorioretinopathy Yandeng. Checks can be found floating in the glass point, floc of inflammatory cells, if serious, could have glass in empyema, leading to retinal detachment traction.
(3) glass in pigmentation. Can be found at the primary retinal detachment, eye inflammation, trauma, and so on. Pigment particles can be derived from retinal pigment layer or vitreous hemorrhage.
(4) intraocular tumors. Infants and young children the most common eye cancer is retinoblastoma, and reticulocyte cell sarcoma was found in the elderly, will lead to vitreous opacity.
(5) glass in the parasites can lead to vitreous opacity, pigs, cattle most common tapeworm of cysticercosis, although all age groups can be, but there are obvious areas of orientation. Once carinii release toxins, can cause serious vitreous opacity, and retinal detachment.
