Vitreous Anatomy

Hyaloid layer or membrane 2. The remaining 1 percent is made up of collagen and hyaluronic acid giving it a gelatinous consistency and optical clarity.

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Thus its composition is rather.

Vitreous anatomy. The vitreous base posterior to the ora serrata varies in width depending on age. A common event occurring in mostly aging eyes is what is called a posterior vitreous detachment PVD. Medullary vitreous Forms majority of vitreous body Structurally similar to cortical vitreous but has less fibrillar structure Running down the centre of the vitreous body from the optic disc to the posterior pole of the lens is hyaloid canal Cloquets canalhyaloid canal Cloquets canal.

Vitreous is composed predominantly of water 99 and the main extracellular matrix components are collagen and glycosaminoglycans. Vitreous is a transparent colour less gel like structure which occupies the posterior compartment of the eye. The vitreous humor also known as vitreous fluid is a transparent colorless gel-like substance that fills the space between the lens and the retina within the eye.

It comprises about 80 of the total volume of the globe two third of total volume of eye about 4mL. It is found precisely behind the eyeball and occupies approximately 80 of the eye region. Vitreous is a transparent colour less gel like structure which occupies the posterior compartment of the eye.

The vitreous body is the transparent gelatinous substance that fills the space of the eye between lens and retina. Worst stating that the premacular bursa was a liquid space overlying the macula and connecting to a retrociliary system of other liquid-filled spaces he termed cisterns. The vitreous is a transparent elastic hydrogel Figure 14-1.

The vitreous body is a semisolid gel structure that is remarkable for the small amount of solid matter that it contains. The vitreous humor comprises a large portion of the eyeball. Anatomy and Physiology of the Nonvitrectomized Eye.

The vitreous body is defined by the internal limiting membrane of the retina posterolaterally by the nonpigmented epithelium of the ciliary body anterolaterally. The vitreous is most firmly attached to the retina at the vitreous base and it also has adhesions at the optic nerve along vessels at the fovea and to the posterior lens capsule. A Cross section diagram of the eye with emphasis on the anatomical features of the vitreous.

STRUCTURE The vitreous is the largest and simplest connective tissuse present as a single piece in the human body Divided in 3 parts 1. The solid material is made up of a form of collagen vitrosin and hyaluronic acid a mucopolysaccharide. However type IX type VXI and small amounts of type VI are also present.

2 Their findings were also complementary withamong other differencesProf. Parthopratim Dutta Majumder Sankara Nethralaya Chennai. The colorless transparent liquid that is present in the Vitreous Chamber is termed as Vitreous Humor.

The surfaces of the intraocular structures that interface with vitreous are mainly basement membrane in nature eg. Cross section of vitreous anatomy. The vitreous base is a three-dimensional zone that extends 152 mm anterior to the ora serrata 13 mm posterior to the ora serrata and several millimeters into the vitreous body itself.

Vitreous collagen is predominantly type II. It occupies about 80 of the volume of the eye Figure 14-2During embryonic development primary secondary and tertiary vitreous are formed and laid down Figure 14-3Their genesis is described in detail in Chapter 2Briefly the primary vitreous is associated with the hyaloid vascular supply system which nourishes. It comprises about 80 of the total volume of the globe two third of total volume of eye about 4mL.

It is a clear gel-like substance that occupies the space behind the lens and in front of the retina at the back of the eye. Hyaloid layer It is not a true membrane but outermost surface of vitreous 1. Ant hyaloid membrane ant limiting membrane layer 2.

The PVD is essentially a shift of fluids as separation of the outer baggie or sack of the vitreous away from the retina. The Vitreous Chamber lies sandwiched between the Anterior and Posterior Chambers of the eye. The vitreous body vitreous meaning glass-like from Latin vitreus equivalent to vitrum glass -eus -ous is the clear gel that fills the space between the lens and the retina of the eyeball of humans and other vertebratesIt is often referred to as the vitreous humor or simply the vitreous.

The vitreous humor is 99 percent water. Anterior hyaloid dissection can be performed at Salzmans hiatus to achieve a complete vitrectomy. Vitreous Body Anatomy In The Eye In this image you will find visual axis anterior chamber cornea limbus suspensory ligament of the lens ciliary process medial rectus muscle hyaloid canal lamina cribrosa the dural sheath in it.

It allows light to pass from the lens to the retina and normally has enough mass. Vitreous Anatomy Macroscopic Morphology In an emmetropic adult human eye vitreous is approximately 165 mm in axial length with a depression anteriorly just behind the lens patellar fossa. Two pioneers of vitreous anatomy Jan Worst and Shoji Kishi used complementary methods to explore the vitreous spaces the former by injecting the liquid spaces with ink 1 the latter by staining the formed vitreous with fluorescein.

This video describes the anatomy of the vitreous and its composition of collagen proteins and water. It represents the remnants of the primary vitreous. This is not to be confused with a much more concerning retinal detachment.

The vitreous humor is composed of mostly water along with a small percentage of collagen glycosaminoglycans sugars electrolytes salts and proteins. The anterior hyaloid presents a complex anatomy and is involved in accommodation by inducing traction on the vitreous base that may be associated with retinal detachment incidence and recurrence.

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