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pterygium
pte·ryg·i·um P0639750 (tə-rĭj′ē-əm)n. pl. pte·ryg·i·ums or pte·ryg·i·a (-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.
[New Latin, from Greek pterugion, diminutive of pterux, pterug-, wing; see pterygoid.]
pte·ryg′i·al (-əl) adj.pterygium (təˈrɪdʒɪəm) n, pl -gia (-dʒɪə) 1. (Pathology) pathol an abnormal tissue growth over the corner of the eye2. (Medicine) pathol an abnormal growth of the cuticle over the nail plate3. (Medicine) pathol a web of skin found on the neck or between digits4. (Anatomy) anatomy obsolete any of various wing-like structures5. (Zoology) entomol obsolete (in some lepidopterans) a lobe at the base of the hind wing6. (Anatomy) anatomy a vertebrate fin7. botany obsolete a petal in the shape of a wingpte•ryg•i•um (təˈrɪdʒ i əm)
n., pl. -ryg•i•ums, -ryg•i•a (-ˈrɪdʒ i ə) an abnormal triangular mass of thickened conjunctiva extending over the cornea and interfering with vision. [1650–60; < New Latin < Greek pterýgion little wing or fin =pteryg-, s. of ptéryx wing, fin] pte•ryg′i•al, adj. Thesaurus| Noun | 1. |  pterygium - either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the cornea; it arises from irritation of the pingueculaconjunctiva - a transparent lubricating mucous membrane that covers the eyeball and the under surface of the eyelid |
Translations
Pterygium
pterygium[tə′rij·ē·əm] (medicine) A triangular mass of mucous membrane growing on the conjunctiva, usually near the inner canthus. Overgrowth of the cuticle forward on the nail. (vertebrate zoology) A generalized vertebrate limb. Pterygium a disease of the conjunctiva of the eye in man and animals, characterized by formation of a conjunctival fold of the sclera that gradually grows on the surface of the cornea and becomes united with it. In man, pterygium is generally caused by prolonged exposure to strong wind, dust, or chemical irritants. The disease develops in the interpalpebral fissure, usually on the nasal side, in the form of a triangle whose base lies on the sclera. If the pterygium reaches the cornea’s optic zone, vision is reduced. The disease is treated surgically. pterygium
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 eye2. Forward growth of the cuticle over the nail plate, seen most commonly in lichen planus. Synonym(s): pterygium unguis3. An abnormal skin web. [G. pterygion, anything like a wing, a disease of the eye, dim. of pteryx, wing] 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 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, windpte·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 pterygiumpte·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
Words related to pterygiumnoun either of two thickened triangular layers of conjunctiva extending from the nasal edge of the eye to the corneaRelated Words |