Inferior ophthalmic vein

Inferior Ophthalmic Vein

Diagram of the veins of the orbit, including the inferior ophthalmic vein.

The inferior ophthalmic vein is a vein that drains the orbit of the eye. It is one of the two main veins of the orbit, the other being the superior ophthalmic vein.

Anatomy

The inferior ophthalmic vein begins in a venous network on the floor of the orbit. It receives tributaries from the lower part of the orbit, including the inferior rectus muscle, the inferior oblique muscle, and the lacrimal sac.

The vein runs posteriorly, below the optic nerve, and usually divides into two branches. One branch passes through the inferior orbital fissure to join the pterygoid plexus of veins. The other branch passes through the superior orbital fissure to join the cavernous sinus.

Function

The primary function of the inferior ophthalmic vein is to drain deoxygenated blood from the structures of the orbit. It plays a crucial role in the venous drainage system of the eye, helping to maintain proper intraocular pressure and ensuring the removal of metabolic waste products from the eye tissues.

Clinical Significance

The inferior ophthalmic vein is clinically significant because it can be involved in various orbital pathologies. For example, thrombosis of the cavernous sinus can affect the drainage of the inferior ophthalmic vein, leading to orbital congestion and increased intraocular pressure. Additionally, the vein can be involved in the spread of infections from the face to the cavernous sinus, a condition known as cavernous sinus thrombosis.

Related Structures

• Superior ophthalmic vein
• Cavernous sinus
• Pterygoid plexus
• Inferior orbital fissure
• Superior orbital fissure

Related Pages

• Orbit (anatomy)
• Venous drainage of the eye
• Cavernous sinus thrombosis