The orbital septum is important.

Weakness in the orbital septum may cause the herniation of the orbital fat pads.

The attached or orbital margins are connected to the circumference of the orbit by the orbital septum.

The orbital septum (palpebral ligament) is a membranous sheet that acts as the anterior boundary of the orbit.

In front, it is connected with the periosteum at the margin of the orbit, and sends off a process which assists in forming the orbital septum.

Then, it pierces the orbital septum, and ends in the skin of the upper eyelid, joining with filaments of the facial nerve.

The orbital septum is an important landmark in distinguishing between orbital cellulitis (inside the septum) and periorbital cellulitis (outside the septum).

The eyelid is made up of several layers; from superficial to deep, these are: skin, subcutaneous tissue, orbicularis oculi, orbital septum and tarsal plates, and palpebral conjunctiva.

That's the area in front of the orbital septum that separates the superficial structures of skin and subcutaneous layers from the deep structures of the orbit - the eye and its setting.

It leaves the orbit at its medial angle by piercing the orbital septum with the supratrochlear nerve, and, ascending on the forehead, supplies the integument, muscles, and pericranium, anastomosing with the supraorbital artery, and with the artery of the opposite side.

Periorbital cellulitis, also known as preseptal cellulitis (and not to be confused with orbital cellulitis, which is behind the septum), is an inflammation and infection of the eyelid and portions of skin around the eye, anterior to the orbital septum.