Superior orbital fissure: passage of nerves of the orbit
Quick facts
- Definition
- Cleft between the greater and lesser wings of the sphenoid, at the back of the orbit.
- Connects
- The orbit with the middle cranial fossa.
- Nerves
- Oculomotor, trochlear, abducens and branches of the ophthalmic nerve (lacrimal, frontal, nasociliary).
- Vessels
- Mainly the superior ophthalmic vein.
- Relevance
- Explains double vision and pain in conditions that affect the orbit.
The superior orbital fissure is a cleft between the greater and lesser wings of the sphenoid bone, at the back of the orbital cavity. It is the main route of communication between the orbit and the middle cranial fossa, and through it pass nerves that move the eye and carry sensation to the forehead and the upper eyelid.
What crosses the fissure?
| Structure | Role |
|---|---|
| Oculomotor nerve | Moves the eye and lifts the eyelid |
| Trochlear nerve | Moves the eye down and inward |
| Abducens nerve | Moves the eye outward |
| Branches of the ophthalmic nerve (V1) | Sensation of the forehead, upper eyelid and globe |
| Superior ophthalmic vein | Drains the orbit into the cavernous sinus |
The terminal branches of the frontal nerve leave the orbit as the supraorbital and supratrochlear nerves, which carry sensation to the forehead and glabella.
What happens if the area is affected?
Conditions that involve structures of the fissure can cause ophthalmoplegia (paralysis of the eye muscles), a drooping eyelid, altered sensation in the forehead and pain. This set of findings is known as superior orbital fissure syndrome, a condition with a medical cause that is not linked to routine aesthetic procedures. It serves as background for understanding diplopia and ophthalmoplegia.
Why does this come up in facial harmonization?
The forehead, glabella and upper eyelid receive sensation from branches that begin at this fissure. Understanding the course helps explain regional anesthesia and the location of pain. This entry is an anatomy basis, not a technique indication.
In Harmy
The app marks areas of the face (such as Glabella and Tear Trough) on the frontal photo. Deep bone structures and nerves do not appear in the projection.
Also known as: sphenoidal fissure.
Frequently asked questions
Which nerves pass through the superior orbital fissure?
Those that move the eye (oculomotor, trochlear and abducens) and branches of the ophthalmic nerve, such as the frontal, lacrimal and nasociliary. The superior ophthalmic vein also passes through.
Why does this matter to someone who does facial harmonization?
Because it helps explain why a condition that affects the nerves of the orbit can cause double vision, a drooping eyelid and pain, and why the area is treated with so much care.