Central retinal vein occlusion
Encyclopedia
The central retinal vein
is the venous equivalent of the central retinal artery
, and like that blood vessel can suffer from occlusion
(central retinal vein occlusion), similar to that seen in ocular ischemic syndrome
. Since the central retinal artery and vein are the sole source of blood supply and drainage for the retina, such occlusion can lead to severe damage to the retina and blindness, due to ischemia
(restriction in blood supply) and edema
(swelling).
It can also cause glaucoma
.
Nonischemic CRVO is the milder form of the disease. It may progress to the more severe ischemic type.
Central retinal vein occlusion results in 100 day glaucoma.
Central retinal vein
The central retinal vein is a short vein that runs through the optic nerve and drains blood from the capillaries of the retina into the larger veins outside the eye...
is the venous equivalent of the central retinal artery
Central retinal artery
The central retinal artery branches off the ophthalmic artery, running inferior to the optic nerve within its dural sheath to the eyeball.- Course :...
, and like that blood vessel can suffer from occlusion
Vascular occlusion
Vascular occlusion is a sudden blockage of a blood vessel, usually with a clot. It differs from thrombosis in that it can be used to describe any form of blockage, not just one formed by a clot. When it occurs in a major vein, it can, in some cases, cause deep vein thrombosis. The condition is...
(central retinal vein occlusion), similar to that seen in ocular ischemic syndrome
Ocular ischemic syndrome
Ocular ischemic syndrome is the constellation of ocular signs and symptoms secondary to severe, chronic arterial hypoperfusion to the eye. Amaurosis fugax is a form of acute vision loss caused by reduced blood flow to the eye that may be a warning sign of an impending stroke...
. Since the central retinal artery and vein are the sole source of blood supply and drainage for the retina, such occlusion can lead to severe damage to the retina and blindness, due to ischemia
Ischemia
In medicine, ischemia is a restriction in blood supply, generally due to factors in the blood vessels, with resultant damage or dysfunction of tissue. It may also be spelled ischaemia or ischæmia...
(restriction in blood supply) and edema
Macular edema
Macular edema occurs when fluid and protein deposits collect on or under the macula of the eye and causes it to thicken and swell. The swelling may distort a person's central vision, as the macula is near the center of the retina at the back of the eyeball...
(swelling).
It can also cause glaucoma
Glaucoma
Glaucoma is an eye disorder in which the optic nerve suffers damage, permanently damaging vision in the affected eye and progressing to complete blindness if untreated. It is often, but not always, associated with increased pressure of the fluid in the eye...
.
Nonischemic CRVO is the milder form of the disease. It may progress to the more severe ischemic type.
See also
- Macular edemaMacular edemaMacular edema occurs when fluid and protein deposits collect on or under the macula of the eye and causes it to thicken and swell. The swelling may distort a person's central vision, as the macula is near the center of the retina at the back of the eyeball...
- Ischemic optic neuropathyIschemic optic neuropathyIschemic optic neuropathy is the loss of structure and function of a portion of the optic nerve due to obstruction of blood flow to the nerve...
- Branch retinal vein occlusion
Central retinal vein occlusion results in 100 day glaucoma.