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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. [2]When the eyes are closed, the whole orbital opening is covered by the septum and tarsi.
The periosteum is a membrane that covers the outer surface of all bones, [1] except at the articular surfaces (i.e. the parts within a joint space) of long bones. (At the joints of long bones the bone's outer surface is lined with "articular cartilage", a type of hyaline cartilage.)
Sometimes it refers specifically to the layer of tissue surrounding the orbit that consists of periosteum. [ 1 ] [ 2 ] However, it may refer to anything that is around the orbit, such as in periorbital cellulitis .
An eyelid is a thin fold of skin that covers and protects the eye. The levator palpebrae superioris muscle helps in the movement of eyelid. The human eyelid features a row of eyelashes along the eyelid margin, which helps in protection of the eye from dust and foreign debris. The main function of eyelid is to keep the cornea moist and clean.
The Orbital Fascia forms the periosteum of the orbit.. It is loosely connected to the bones and can be readily separated from them. Behind, it is united with the dura mater by processes which pass through the optic foramen and superior orbital fissure, and with the sheath of the optic nerve.
Transconjunctival blepharoplasty technique permits the excision (cutting and removal) of the lower-eyelid adipose tissue without leaving a visible scar, but the technique does not allow the removal of excess eyelid-skin. [6] Initial incision along the upper left eyelid. A blepharoplasty operation usually requires 1–3 hours to complete.
Eyelid edema is a condition in which the eyelids are swollen and tissues contain excess fluid. It may affect eye function when it increases the intraocular pressure. Eyelid edema is caused by allergy, trichiasis or infections. [4] The main symptoms are swollen red eyelids, pain, and itching. Chronic eyelid edema can lead to blepharochalasis.
Enophthalmos in Horner's syndrome is an illusion created by the subtle ptosis of the upper eyelid caused by paralysis of the superior tarsal muscle. [ 7 ] Sinking in of the eye (true enophthalmos ) is possibly caused by paralysis of the smooth (orbitalis) muscle in the floor of the orbit.