How is vitreous opacity caused?

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asked in Ophthalmology by IDA
How is vitreous opacity caused?

1 Answer

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answered by VIVIAN
What is the cause of vitreous opacity?
Vitreous opacity can be caused by the following lesions:
1, uveitis, inflammatory exudate and inflammatory cells into the vitreous formation of gray dust-like, flocculent or lumpy turbidity.
2, bleeding, retinal vein inflammation, venous obstruction, diabetes, high blood pressure, trauma or surgery caused by bleeding into the vitreous, in the blood into and absorb the process of the formation of red, yellow, gray flake or lumpy turbidity.
3, pigment, trauma, uveitis and so on to the pigment particles into the vitreous.
4, parasites and their metabolites, intraocular tumor or other parts of the body tumor ocular metastasis, causing turbidity.
5, eye trauma in vivo disappearance of foreign body.
6, due to eye trauma, bleeding, diabetes and other fibrous tissue hyperplasia caused by vitreous.
7, vitreous degeneration, more common in the elderly and high myopia, vitreous hyaluronic acid solution liquefaction, diabetes and hypercholesterolemia in the body of the body may have cholesterol crystals calm.
Classification of vitreous opacity
Congenital opacity
For the embryonic development of abnormal residues, and more in childhood can feel.
Endogenous turbidity
That is, the vitreous itself caused by the denaturation, there are three, one is the vitreous after the vitreous of the vitreous detachment, the patient often have a ring in front of the shadow, high myopia patients more common, the second is the stellate vitreous disease, Male more common, the third known as the vitreous vitreous liquefaction, may be associated with atherosclerosis, hypercholesterolemia and so on. These three kinds of degeneration have little effect on vision.
Exogenous opacity
This type of turbidity often affects vision and can cause lesions around the vitreous tissue. Common are:
(1) vitreous hemorrhage. Most common. Vitreous itself without blood vessels, where the bleeding is foreign, especially to see the retina of large blood vessels, high blood pressure, diabetes, retinal vein plugs and other common in the elderly, trauma is also a common cause. Bleeding, such as long-term non-absorption, can occur in the machine, proliferation, leading to retinal detachment.
(2) vitreous inflammatory exudation. Common in uveitis, suppurative endophthalmitis, sympathetic ophthalmia, syphilitic retinal choroiditis and so on. Examination can be found in the vitreous floating point-like, flocculent inflammatory cells, if serious, may have vitreous empyema, eventually leading to traction retinal detachment.
(3) vitreous pigmentation, can be seen in primary retinal detachment, endophthalmitis, trauma and so on. Pigment particles may be derived from the retinal pigment layer or intravitreal hemorrhage.
(4) intraocular tumors. Infants and young children the most common intraocular malignant tumor is retinoblastoma, and reticulocyte sarcoma is found in the elderly, will lead to vitreous opacity.
(5) vitreous parasites in the body can also lead to vitreous opacity, to pigs, tapeworm cercariae most common, although the age group can occur, but there are obvious regional distribution tendencies. Once the cysticercosis release toxins, can cause severe vitreous opacity, retinal detachment.
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