eyelids


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eyelids

A pair of movable folds of skin which act as protective coverings of the eye. The upper eyelid extends downward from the eyebrow and is the more moveable of the two. When the eye is open and looking straight ahead, it just covers the upper part of the cornea; when it is closed, it covers the whole cornea. The lower eyelid reaches just below the cornea when the eye is open and rises only slightly when it shuts. Each eyelid consists of the following layers, starting anteriorly: (1) skin, (2) a layer of subcutaneous connective tissue, (3) a layer of striated muscle fibres of the orbicularis muscle, (4) a layer of submuscular connective tissue, (5) a fibrous layer, including the tarsal plates, (6) a layer of smooth muscle, (7) the palpebral conjunctiva. Syn. blephara; lids; palpebrae. See ablephary; blepharitis; ciliosis; ectropion; entropion; epicanthus; lid eversion; eyelid lamella; lagophthalmos; palpebral ligament; myokymia; orbital septum; phthiriasis; Cogan's lid twitch sign; Collier's sign; Dalrymple's sign; inferior palpebral sulcus; superior palpebral sulcus; tarsorrhaphy; tarsus; xanthelasma.
eyelids lamella The eyelid is sometimes conceptualized as consisting of an anterior and a posterior lamella. The anterior lamella consists of the skin, the layer of subcutaneous connective tissue and the layer of striated muscle fibres of the orbicularis muscle. The posterior lamella consists of the tarsal plates, a layer of smooth muscle (Müller's palpebral muscle), and the palpebral conjunctiva.
eyelids retractor muscles The eyelid muscles that open the palpebral aperture. The upper eyelid is elevated by the levator palpebrae superioris muscle and the superior tarsal muscle (of Müller) and the lower eyelid is depressed by the inferior tarsal muscle (of Müller).

eyelids,

n.pl a moveable fold of thin skin over the eye. The orbicularis oculi muscle and the oculomotor nerve control the opening and closing of the eyelid.

Patient discussion about eyelids

Q. eyelids what causes your eye lids too twitch? my left eye lid has been twitching on and off for about a week what causes it and how can i get it to stop.

A. Not an answer, just another question - how long can this go on? My eyelid has been twitching, (likely lack of sleep) for almost a month now. Any treatment that I should seek?

More discussions about eyelids
References in periodicals archive ?
Eyelid injuries that result in tissue loss provide a difficult reconstructive challenge.
Also, the lower eyelid sagging away from the eye, eyelids that roll inwards, inflammation of the edges of the eyelids, blocked or narrowed tear ducts, eye irritation, an eye infection or an allergy, can cause watering.
All four upper and lower eyelids exhibited cicatricial ectropion and lid retraction with significant lagophthalmos and corneal epitheliopathy.
02% concentration of hypochlorous acid in both spray and gel formulations that can be used to supplement existing OCuSOFT Lid Scrub eyelid cleansers in the most severe cases of eyelid disorders.
The patient had been diagnosed with the rare cancerous tumours in his upper and lower eyelids, and treating doctors at the Mafraq Hospital decided to remove the eyelids completely in order to stop the spread of the tumour, the Abu Dhabi Health Services Company (Seha) announced in a statement issued on Saturday.
has launched its newest product Cliradex Light advanced foaming eyelid cleanser into global online availability on its newly redesigned website, the company said.
Kissing nevus or divided nevus is a rare form of congenital nevus which appears over two adjacent sites which are fused together in utero in the early stages of development but get separated later on like the two eyelids.
The data reveal that the gas in the outer portion of IC 2163's eyelids is racing inward at speeds in excess of 100 kilometers a second.
The observation has allowed scientists to study the structure in unprecedented detail, revealing that the gas in the outer portion of IC 2163's eyelids races inward at speeds of over 100 km (62 miles) a second before aligning itself with the rotation of the galaxy - a phenomenon the researchers likened to a massive ocean wave interacting with the shallows and dumping all its water and sand on the beach.
Conclusion: Frozen section control can provide low re-recurrence rate in patients with recurrent BCC of the eyelids.
Flap dehiscence occurred in 3 (2%) eyelids, all within 2 weeks postoperatively, and were all successfully treated with another surgery involving dissection through prior granulation tissue and repeat flap suturing.
In the recent two months, the patient's normal life has been compromised by the fact that she needs to pull her eyelids up with hands while she walks.