Inferior orbital fissure

The lateral wall and the floor of the orbit are separated posteriorly by the inferior orbital fissure which transmits the maxillary nerve and its zygomatic branch, and the ascending branches from the pterygopalatine ganglion. The infraorbital vessels are found in the inferior orbital fissure, and travel down the infraorbital groove into the infraorbital canal and exit through the infraorbital foramen. It is formed by the sphenoid bone and maxilla.

Content:

• infraorbital nerve (branch CN V2), artery and vein

• inferior ophthalmic vein

• zygomatic nerve (branch CN V2)

• orbital branches of the pharyngeal nerve

• ganglionic branches from pterygopalatine ganglion to maxillary division of trigeminal nerve