Retinal vein

Retinal Vein

The retinal vein and its branches, as illustrated in Gray's Anatomy.

The retinal vein is a crucial component of the human eye. It is responsible for draining the blood from the retina, the light-sensitive layer of tissue at the back of the eye.

Anatomy

The retinal vein is formed by the confluence of several smaller veins in the retina. These smaller veins, known as the superior retinal vein and the inferior retinal vein, drain different quadrants of the retina. The retinal vein then exits the eye through the optic nerve.

Function

The primary function of the retinal vein is to carry deoxygenated blood away from the retina. This blood is then transported to the heart and lungs for reoxygenation.

Clinical significance

Blockage of the retinal vein, known as retinal vein occlusion, can lead to vision loss. This condition is typically caused by a blood clot and is more common in individuals with certain risk factors, such as hypertension and diabetes.

See also

• Retinal artery
• Central retinal vein
• Retinal vein occlusion