Central retinal vein
| Central retinal vein | |
|---|---|
| File:Gray572.png Veins of orbit. (Central retinal vein not labeled, but region is visible - the vein is inside the optic nerve.) | |
| File:Gray877.png Diagram of the blood vessels of the eye, as seen in a horizontal section. (Central retinal vein not labeled, but region is visible. The central retinal vein is at bottom running away from the retina through the optic nerve.) | |
| Details | |
| Drains from | Retina |
| Drains to | Superior ophthalmic vein or cavernous sinus |
| Artery | Central retinal artery |
| Identifiers | |
| Latin | vena centralis retinae |
| TA98 | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] | |
The central retinal vein (retinal vein) is a vein that drains the retina of the eye. It travels backwards through the centre of the optic nerve accompanied by the central retinal artery before exiting the optic nerve together with the central retinal artery to drain into either the superior ophthalmic vein or the cavernous sinus.
Structure
[edit | edit source]Origin
[edit | edit source]The central retinal vein is formed by the convergence of veins that drain retinal tissue. The central retinal vein originates within the eyeball, emerging from the eyeball already as a single unified vein.[1]
Course
[edit | edit source]The central retinal vein runs through the centre of the optic nerve (alongside the central retinal artery) surrounded by a fibrous connective tissue envelope.[2] It leaves the optic nerve 10 mm from the eyeball[citation needed] along with the central retinal artery, also exiting the meningeal envelope of the optic nerve.[1]
Fate
[edit | edit source]The central retinal vein drains into either the superior ophthalmic vein or the cavernous sinus.[1]
Variation
[edit | edit source]The central retinal vein varies between individuals.[3] in some the central retinal vein drains into the superior ophthalmic vein, and in some it drains directly into the cavernous sinus.[3][4]
Clinical significance
[edit | edit source]Central retinal vein occlusion
[edit | edit source]The central retinal vein is the venous equivalent of the central retinal artery. Like that blood vessel, it can suffer from occlusion (central retinal vein occlusion).[5] This occlusion is similar to that seen in ocular ischemic syndrome.
Papilledema
[edit | edit source]As the fluid surrounding the optic nerve within its meningeal envelope is contiguous with the cerebrospinal fluid of the central nervous system, increased intracranial pressure can cause compression of the central retinal vein where it emerges from the optic nerve (the accompanying artery is meanwhile less susceptible to compression due to its thicker arterial wall), with the resulting venous congestion causing oedema of the optic nerve (papilledema).[1]
Additional images
[edit | edit source]-
Interior of posterior half of bulb of left eye. The veins are darker in appearance than the arteries. -
Eye vessels
References
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- ^ MeSH entry for central retinal vein - National Library of Medicine - Medical Subject Headings - 2007
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External links
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