What is retinal vasculature?

What is retinal vasculature?

The inner retina is supplied from the retinal vasculature, which gets it input from the central retinal artery (CRA). At the optic disc that CRA bifurcates into several branches that provide the blood supply of the entire inner retina. The venous part of the retinal circulation is arranged in a similar way.

What causes retinal vascular disorder?

Retinal vascular disease is an important cause of visual loss, which requires prompt diagnosis and treatment. Common causes of retinal vascular disease include hypertensive retinopathy, retinal vein and artery occlusions and diabetic retinopathy.

Is retina vascular or avascular?

The retina of lower vertebrates is avascular, but is usually provided with two external blood supplies, the choriocapillaris on the outer surface and a vitreal blood supply on the inner surface.

What is retinal vascular occlusion?

A blockage in an artery or vein is called an occlusion or stroke. When the flow of blood from the retina is blocked, it is often because a blot clot is blocking the retinal vein. This condition is called retinal vein occlusion (RVO). Nerve cells need a constant supply of blood to deliver oxygen and nutrients.

How can you tell the difference between a vein and a retinal artery?

There are mainly four different characteristics that have been used in the literature to distinguish between retinal arteries and veins: (I)arteries differ in color from veins; (II) arteries are thinner than adjacent veins; (III) the central reflex is wider in arteries than in comparably sized veins, and (IV) arteries …

How do you get rid of a blood clot in your retina?

There’s no medication available that’s specific for retinal artery occlusions. Most people with this condition will have permanent changes to their vision. To treat retinal vascular occlusion, your doctor may recommend medication such as blood thinners or injections into the eye.

What is the function of retinal blood vessels?

The retinal vessels provide blood to the inner retinal neurons. The avascular photoreceptor layer relies on the choriocapillaris lying beneath the retinal pigment epithelium to supply oxygen by diffusion.

Can you go blind from retinal vein occlusion?

It turns light into signals to the brain, which interprets them as sight. When a vein in the retina becomes blocked, it’s called retinal vein occlusion. This can give you blurry vision or even sudden permanent blindness in that eye. It’s similar to retinal artery occlusion, which is sometimes called an eye stroke.

Can you have retinopathy without diabetes?

Retinopathy lesions are commonly seen in middle aged and elderly people without diabetes. Common ocular conditions associated with retinopathy in non-diabetic patients include retinal vein occlusions, retinal telangiectasia, and retinal macroaneurysms.

What is retinal artery vein occlusion and what causes it?

Retinal vein occlusion is a condition of the eye that may cause partial or total vision loss, although it may be asymptomatic. It is caused by a blockage in the primary vein that drains blood from the retina, or a smaller branch of this vein.

What increases the risk of retinal artery occlusion?

A study shows that patients who experience migraines are at a higher risk of retinal artery occlusion, and that patients who experience migraines with aura are even more likely to develop retinal artery occlusion.

What tests are used to diagnose retinal vein occlusion?

Sometimes, you may also need a test called optical coherence tomography. You may get drops to dilate your pupils and then a machine scans your eyes with rays of light to make a detailed image of your retina. There’s no cure for retinal vein occlusion.

What is the treatment for retinal vein occlusion?

Treatment options for retinal vein occlusions include laser surgery and intraocular injections of medications that prohibit abnormal blood vessel growth (anti-VEGF drugs) and anti-inflammatory agents (corticosteroids).