In this article we shall look at the anatomy of the eyelids their layers vasculature and innervation. The eyelids are split into upper and lower portions which meet at the medial and lateral canthi of the eye.
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Anterior and posterior lamellae separated by an orbital septum.
Upper eyelid anatomy. 2 compartments for each eyelid. 2 contents for each compartment. Upper eyelid and lower eyelid.
The thickest part of the upper eyelid is just below the eyebrow 1127238 µm and the thinnest near the ciliary margin 32049 µm. It is distinguished from the forehead skin by the presence of eyebrows. Eyelid anatomy including thickness measurements was examined in numerous age groups.
The upper eyelid crease falls 610 mm from the eyelid lash line. Upper and lower eyelid anatomy. Overview of external anatomy.
American academy of ophthalmology. The opening between the two eyelids is called the palpebral aperture or opening. Overview of upper eyelid.
Soof suborbicularis oculi fat. Upper and lower eyelid anatomy. Similarly the lower eyelid starts at the eye and extends to join the skin of the cheek.
The lower lid rests at the inferior limbus and peaks 1 mm lateral to the center of the pupil. Modified from stewart wb. The thickness of skin at 7 mm above the eyelashes was 860305 µm.
Roof retro orbicularis oculi fat. Ophthalmology monograph 8 vol 2. Upper eyelid anatomy is complex best remembered by the rule of 2s.
Skin and muscle tarsus and conjunctiva. It can be a manifestation of the normal aging process a congenital condition or due to an injury or disease. The highest peak on the upper eyelid lies slightly nasal and the lowest contour of the lower eyelid rests slightly lateral.
The upper eyelid crease is a horizontal indentation formed by the attachment of the superficial levator aponeurosis fibers into the orbicularis oris intermuscular septa and subcutaneous tissue. Surgery of the eyelid orbit and lacrimal system. The upper eyelid skin crease superior palpebral sulcus is approximately 8 11 mm superior to the eyelid margin and is formed by the attachment of the superficial insertion of levator aponeurotic fibers 8 9 mm in men and 9 11 mm in women.
Illustration by cyndie c. The upper eyelid generally covers 13 mm of the upper cornea and the lower eyelid typically rests at or near the lower limbus. Ptosis drooping eyelid is when the upper eyelid droops or sags due to weakness or paralysis of the levator muscle responsible for raising the eyelid or due to damage to nerves controlling the muscle.
The upper lid naturally rests 1 to 2 mm below the superior limbus and peaks 1 mm medial to the center of the pupil. The upper and lower eyelids along with the upper and lower puncta oppose the globe. The upper eyelid starts at the eye and extends up words joined the skin of the forehead.
Upper eyelid anatomy the upper eyelid is composed of very thin skin structurally dense fibrous tissue tarsal plate and muscles that close protractors and open retractors the lids.
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