Vitreous Body


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Related to Vitreous Body: retina, Ora serrata

vitreous body

[′vi·trē·əs ′bäd·ē]
(physiology)

Vitreous Body

 

(1) The transparent gel that fills the eye cavity between the retina and the lens. The vitreous body is part of the eye’s dioptric medium, which transmits light rays to the retina. In humans, there are no blood vessels in the vitreous body of an adult. The liquid part of the body consists of viscous hyaluronic acid and traces of serum proteins, ascorbic acid, salts, and other substances; it is enclosed in a network of delicate protein fibrils. The vitreous body is surrounded by a hyaline film that firmly adheres to the macula retinae and the ciliary parts of the eye and in some animals, to other parts of the retina.

(2) The drug obtained from the vitreous body of the eyes of cattle; it belongs to the group of biogenic stimulants. Vitreous body is used subcutaneously in solutions to facilitate the resolution of scar tissue. It is also used in cases of joint contractures and as an analgesic in various disorders, including neuralgia and radiculitis.

References in periodicals archive ?
Ascorbic acid is found in higher concentrations in the vitreous body than in the plasma [11].
The MRI enhancement of the visual pathway requires an effective Mn [sup]2+ concentration in the vitreous body.
In the vitreous body of diabetic patients with PDR, the level of a soluble vascular endothelial growth factor receptor-1 (sVEGF-R1) has been significantly higher, and the level of PEDF was lower as compared to the control group of patients with diabetes but no signs of retinopathy [90].
These authors attributed existing problems to the techniques used for the determination of iron and reported more reliable iron concentration values in the serum and the aqueous humor and vitreous body of several animal species, using an atomic absorption spectroscopic (AAS) method.
Collagen and hyaluronic acid are selected on the basis of the fact that they are the constituents of natural vitreous body itself.
Posterior vitreous detachment (PVD) entails the collapse of the vitreous body and anterior displacement of the posterior vitreous cortex and is the most common cause of vitreous floaters [1].
Background: This study was to examine the expression of total vascular endothelial growth factor (VEGF) and the anti-angiogenic VEGF [sub]165 b isoform in the vitreous body of retinopathy of prematurity (ROP) patients, and to further study the role of the VEGF splicing in the development of ROP.
Table 1 Number of referrals to HES classified by pathology and urgency of referral Pathology Emergency Urgent Routine Report Lens 0 2 30 2 Ret det/tear, 8 20 5 0 retinal other, vitreous body Macula 6 15 2 1 Glaucoma/OHT 3 3 12 0 Cornea 10 6 3 0 Figure 1 The numbers of different methods used for reports and referrals Forms used for referral or reports Plain paper 7 OLD WEHE/PEARS form 32 AMD referral 4 Practice pro forma 343 Optometrist to GP form 110 GOS 18 118 WEHE/PEARS form 228 Note: Table made from bar graph.
The sudden acceleration of the vitreous body in closed globe injury may lead to extensive tearing of the retina around the base of the vitreous far out in the periphery.
Perforation of the cornea is rare, but if it occurs, the fungus may invade the uvea, vitreous body, and retina.
The human vitreous body consists of approximately 98% water and macromolecules including collagen and hyaluronic acid [1].
The most common causes are agerelated destruction and liquefaction of the vitreous body. The vitreous detachment following degeneration can cause holes and tears through traction on the peripheral retina, allowing the liquid part of the vitreous to penetrate and separate the neurosensory layer from the pigment epithelial layer.