Orbital septum

septum
The orbital septum (palpebral fascia) is a membranous sheet that acts as the anterior boundary of the orbit.wikipedia
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Orbit (anatomy)

orbitorbitseye socket
The orbital septum (palpebral fascia) is a membranous sheet that acts as the anterior boundary of the orbit.
The orbital contents comprise the eye, the orbital and retrobulbar fascia, extraocular muscles, cranial nerves II, III, IV, V, and VI, blood vessels, fat, the lacrimal gland with its sac and nasolacrimal duct, the eyelids, medial and lateral palpebral ligaments, check ligaments, the suspensory ligament, septum, ciliary ganglion and short ciliary nerves.

Eyelid

eyelidspalpebralpalpebra
It extends from the orbital rims to the eyelids.
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.

Tarsus (eyelids)

tarsal plateSuperior tarsustarsi
In the upper eyelid, the orbital septum blends with the tendon of the levator palpebrae superioris, and in the lower eyelid with the tarsal plate.
The attached or orbital margins are connected to the circumference of the orbit by the orbital septum.

Orbital cellulitis

orbit
The orbital septum is an important landmark in distinguishing between orbital cellulitis (inside the septum) and periorbital cellulitis (outside the septum).
Orbital cellulitis is inflammation of eye tissues behind the orbital septum.

Periorbital cellulitis

cellulitisinfectious eye conditionperiorbit
The orbital septum is an important landmark in distinguishing between orbital cellulitis (inside the septum) and periorbital cellulitis (outside the septum).
Periorbital cellulitis, (and not to be confused with orbital cellulitis, which is posterior to the orbital septum), is an inflammation and infection of the eyelid and portions of skin around the eye anterior to the orbital septum.

Blepharoplasty

blepharoplastieseyelid surgeryeye lift
The operation to correct this is called blepharoplasty.
Sequentially, lower eyelid blepharoplasty can successfully address the anatomic matters of excess eyelid skin, slackness of the eye-muscles and of the orbital septum (palpebral ligament), excess orbital fat, malposition of the lower eyelid, and prominence of the nasojugal groove, where the orbit (eye socket) meets the slope of the nose.

Biological membrane

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

Levator palpebrae superioris muscle

levator palpebrae superiorislevator palpebraeLevator palpebræ superioris
In the upper eyelid, the orbital septum blends with the tendon of the levator palpebrae superioris, and in the lower eyelid with the tarsal plate.

Medial palpebral ligament

medialmedial canthal tendon
Medially it is thin, and, becoming separated from the medial palpebral ligament, attaches to the lacrimal bone at its posterior crest.

Posterior lacrimal crest

posterior crest
Medially it is thin, and, becoming separated from the medial palpebral ligament, attaches to the lacrimal bone at its posterior crest.

Face

human facefacialfacial feature
The septum is perforated by the vessels and nerves which pass from the orbital cavity to the face and scalp.

Scalp

scalp hair
The septum is perforated by the vessels and nerves which pass from the orbital cavity to the face and scalp.

Orbital fascia

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.

Supratrochlear artery

supratrochlearFrontal arteryArteria supratrochlearis
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.

Dermatochalasis

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

Lacrimal nerve

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

Mongoloid

MongolianMongoloid raceMongoloids
Jeong et al. said that the cause of the "Asian single eyelid" was that "the orbital septum fuses to the levator aponeurosis at variable distances below the superior tarsal border; (2) preaponeurotic fat pad protusion and a thick subcutaneous fat layer prevent levator fibers from extending toward the skin near the superior tarsal border; and (3) the primary insertion of the levator aponeurosis into the orbicularis muscle and into the upper eyelid skin occurs closer to the eyelid margin in Asians."