vitreous humour

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vitreous humour

A transparent, colourless gel which occupies the stroma of the vitreous body. The vitreous humour is secreted by the ciliary body processes, which provides nutrition to the lens; the aqueous humour passes through the pupil, leaves by the trabecular meshwork and Schlemm’s canal, and passes into the aqueous veins.

The vitreous humour is of forensic interest, because the in vivo serum levels of alcohol, drugs and other substances can be estimated from the vitreous humour—e.g., at equilibrium, the ratio of blood alcohol concentration (BAC) to vitreous humour alcohol concentration (VHAC) is 0.81, with the caveat that estimating the BAC based only on vitreous humour (i.e.,without blood) is unscientific.

vitreous humour

the liquid jelly-like material occupying the space within the eyeball behind the lens of the eye.

humour, vitreous

A transparent, colourless, gelatinous mass of a consistency somewhat firmer than egg white which fills the space between the crystalline lens, the ciliary body and the retina, and constitutes four-fifths of the volume of the eye. The vitreous is about 99% water, the remaining 1% includes hyaluronic acid, organic salts and soluble and insoluble proteins especially collagen (mainly type II). It is firmly attached to the pars plana of the ciliary body near the ora serrata in an area known as the vitreous base and around the optic disc. In older people and in pathological conditions the vitreous is no longer in a gel state, tending to become fluid. Syn. vitreous body. See hyaloid artery; asteroid hyalosis; floaters; hyaloid remnant; synchisis scintillans; Wagner's syndrome; vitreous base; vitreous detachment.
References in periodicals archive ?
Simo, "Interleukin-8, monocyte chemoattractant protein-1 and IL-10 in the vitreous fluid of patients with proliferative diabetic retinopathy," Diabetic Medicine, vol.
Simo, "Usefulness of the vitreous fluid analysis in the translational research of diabetic retinopathy," Mediators of Inflammation, vol.
Undiluted vitreous fluid samples (0.3-0.6mL) and paired serum samples were obtained from 46 patients with PDR during pars plana vitrectomy.
In the present study, we investigated the correlations between the levels of BDNF and the levels of HMGB1 in the vitreous fluid and serum from patients with PDR and in the retinas of rats with diabetes.
tuberculosis in vitreous fluids (VFs) from patients with Eales' disease and non-Eales' disease.
In an earlier study, we demonstrated the presence of Mycobacterium tuberculosis complex DNA in 5 of 12 vitreous fluids (VFs) from Eales' disease patients compared to 1 of 45 VFs of the control group by application of polymerase chain reaction (PCR) technique using IS 6110 primers (7).
The team in Japan analyzed vitreous fluid drawn from 73 patients with retinopathy who had diabetes--for 12 years, on average--and from 71 others whose retinopathy stemmed from other eye diseases.
Molecular studies also have identified the presence of the Epstein-Barr virus (EBV) genome in the cerebrospinal (CSF) and vitreous fluid of patients with VKH disease.
TOTAL PROTEIN ESTIMATION FROM CLINICAL ISOLATES: Total protein from clinical isolates (serum and vitreous fluid) as well as cell culture supernatant and cell lysates were estimated by Bicinchoninic acid (BCA) assay (Smith et al., 1987) (9) as per requirement.
Rhegmatogenous retinal detachment: A retinal tear allows vitreous fluid to enter the subretinal space.
NI methods attempt to determine glucose in other body fluids, such as in tissue interstitial fluid, eye vitreous fluid, or tears, as substitutes for venous or capillary blood glucose.
reported that vitreous fluid levels of VEGF and inflammatory factors were higher in the major BRVO group than the macular BRVO group which may have affected the preoperative VA and the CFT, though there was no significant difference in the postoperative status at 6 months after surgery [14].