pterygium

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Related to pterygia: pinguecula, multiple pterygium syndrome

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 ?
Heredity in one hundred patients admitted for excision of pterygia.
Health care providers in North Carolina note that pterygia are seen among farmworkers.
20] The best method of protection against UV rays, dust, wind, and other allergens that cause pterygia and other disorders is the use of a wide-brimmed hat and sunglasses.
Pterygia arise on the side of the eye nearer the nose because sunlight entering the eye from the other side is magnified 20 times by the cornea as it passes through.
Pterygia can be removed surgically, but they tend to regrow much more quickly than they grew originally.
Due to PLF, the majority of pterygia occur on the nasal side of the eye, and they are frequently bilateral and asymmetrical.
Consent was obtained and participants were shown three photographs of eyes with pterygia (Fig.
2) It was the only positive factor associated with the formation of pterygia in this study.
10) Pterygium removal could also be performed in the event of contact lens intolerance, chronic irritation, patients' cosmetic concerns, or unusual-looking pterygia mimicking dysplasia.
NASDAQ:INSV) today announced a Phase II study has commenced using its ISV-120 product candidate for the prevention of recurrent pterygia, an abnormal tissue growth across the front of the eye which affects approximately four million people a year worldwide.