pterygium


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pterygium

 [tĕ-rij´e-um]
a winglike structure, especially an abnormal triangular fold of membrane in the interpalpebral fissure, extending from the conjunctiva to the cornea.
Pterygium. From Stein et al., 2000.
pterygium col´li webbed neck.

pte·ryg·i·um

(tĕ-rij'ē-ŭm),
1. A triangular patch of hypertrophied bulbar subconjunctival tissue, extending from the medial angle or canthus of the eye to the border of the cornea or beyond, with apex pointing toward the pupil. Synonym(s): web eye
2. Forward growth of the cuticle over the nail plate, seen most commonly in lichen planus. Synonym(s): pterygium unguis
3. An abnormal skin web.
[G. pterygion, anything like a wing, a disease of the eye, dim. of pteryx, wing]

pterygium

/pte·ryg·i·um/ (tĕ-rij´e-um) pl. ptery´gia   [Gr.] a winglike structure, especially an abnormal triangular fold of membrane in the interpalpebral fissure, extending from the conjunctiva to the cornea.
pterygium col´li  webbed neck; a thick skin fold on the side of the neck from the mastoid region to the acromion.

pterygium

(tə-rĭj′ē-əm)
n. pl. pteryg·iums or pteryg·ia (-ē-ə)
An abnormal mass of tissue arising from the conjunctiva of the inner corner of the eye that obstructs vision by growing over the cornea.

pte·ryg′i·al (-əl) adj.

pterygium

[tərij′ē·əm]
Etymology: Gk, pterygion, wing
a thick triangular patch of pale hypertrophied tissue that extends medially from the nasal border of the cornea to the inner canthus of the eye.
enlarge picture
Pterygium

pterygium

Ophthalmology A condition of older adults, characterized by a fleshy triangular fold of tissue that grows from the conjunctiva, encroaching on the cornea; it is clinically insignificant unless it affects the vision; it is usually on the nasal side, and may be bilateral Risk factors Exposure to sun and UV light, dust, sand, wind

pte·ryg·i·um

(tĕr-ij'ē-ŭm)
1. A triangular patch of hypertrophied bulbar subconjunctival tissue, extending from the medial canthus to the border of the cornea or beyond, with its apex pointing toward the pupil.
2. Forward growth of the cuticle over the nail plate, seen most commonly in lichen planus.
3. An abnormal skin web.
[G. pterygion, anything like a wing, a disease of the eye, dim. of pteryx, wing]

pterygium

A wing-shaped thickening of the CONJUNCTIVA that extends over the visible area of the white of the eye and across on to the CORNEA. Pterygium is common in tropical areas and is due to ultraviolet light damage from exposure to sunlight or to local corneal drying. Pterygium usually recurs following surgical removal. Also known as web-eye or duffir (Arabic).

pterygium 

A triangular fold of bulbar conjunctiva, in the interpalpebral fissure, with its apex advancing progressively towards the cornea, usually from the nasal side. A pinguecula often precedes its development. It is considered to be due to a degenerative process caused by recurrent dryness or irritation from wind and dust or prolonged exposure to sunlight, especially UV. It becomes more prevalent with age. Symptoms are usually absent unless the pterygium encroaches on the cornea and vision may then be affected: surgical intervention is then necessary. Some pterygia tend to recur after excision. UV absorptive lenses may help decrease the incidence (Fig. P21). See dellen; dyskeratosis; Stocker's line; pseudopterygium.
Fig. P21 Advanced case of pterygiumenlarge picture
Fig. P21 Advanced case of pterygium

pte·ryg·i·um

(tĕr-ij'ē-ŭm)
1. Triangular patch of hypertrophied bulbar subconjunctival tissue, extending from medial angle or canthus of eye to border of cornea or beyond, with apex pointing toward pupil.
2. Forward growth of the cuticle over the nail plate, seen most commonly in lichen planus.
[G. pterygion, anything like a wing, a disease of the eye, dim. of pteryx, wing]

pterygium

a winglike structure, especially an abnormal triangular fold of membrane in the interpalpebral fissure, extending from the conjunctiva to the cornea.
References in periodicals archive ?
Of the many disorders affecting these structures, corneal ulcers and pterygium are particularly difficult to treat.
The objective of the study is to assess the outcome of serum assisted conjunctival autograft in primary pterygium cases.
According to Duke-Elder, (11) pterygium occurs without exception on the nasal side of the conjunctiva, and many studies supporting that assertion were later published.
Prevalence and risk factors of pterygium and pinguecula: the Tehran Eye Study.
Launched in January 2010, the program offers surgical treatment for people suffering from three specific conditions: cataracts, diabetic retinopathy (damage to the retina caused by complications of diabetes mellitus) and pterygium (a non-cancerous fleshy growth, usually on the surface of the eye) free of cost.
ESCOBAR Syndrome is the milder form of an otherwise fatal congenital condition correctly known as Multiple pterygium syndrome.
Ocular morbid conditions are cataract, refractive errors, Xerophthalmia, Pterygium, strabismus, dacryocystitis, etc; are some of them.
Cortical cataract, pinguecula and pterygium are the most common eye conditions related to sun exposure in SA.
It definitely increases protection and can prevent direct UV damage to the eyes (peratitis, cataracts, pterygium and macular degeneration) as well as helping to prevent skin cancer around the eyes (periocular).
Six families with van der Woude and/or popliteal pterygium syndrome: all with a mutation in the IRF6 gene.
The nail of right middle finger showed dorsal pterygium, while that of left middle finger showed longitudinal splitting (Figure 3).
Mutations in IRF6 cause Van der Woud syndromes (VWS) and Popliteal pterygium syndrome (PPS) has been reported for human (Lees et al.