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Pterygium

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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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive
The main treatment for pterygium is surgery, and the basic objective is the prevention of recurrence.
Dr Armstrong stressed that the hospital has at least one pterygium surgery a week, as well as one new patient diagnosed with the condition each week.
Herein, we report the efficacy of recurrence prevention-compared Ologen transplantation with conjunctival autograft surgery in primary pterygium.
Pterygium inversum unguis is an infrequent disorder, where an exaggerated stratum corneum in the distal nail bed or hyponychium leads to obliteration of the distal groove.
Previously harvested and frozen amniotic graft was applied in different types of ocular surface disorders, such as corneal ulcers, pterygium, keratomalacia, Steven-Johnson syndrome, etc.
Over 12,000 indigentFilipino natives were provided free medical treatment, includingthousands of dollars in medication, check-ups, eye-exams, eyeglasses,surgical procedures for cataracts, glaucoma, pterygium, and cystremovals.
They include splitting, longitudinal ridging, nail dystrophy, and pterygium unguis formation (2-10).
Of these, there was systemic drug use in 5, diabetes mellitus in two and five, pterygium in 3 and meibomian gland dysfunction in 1).
His knees were flexed because of bilateral popliteal pterygium.
(4) The occurrence of different leprosy-related eye complications in LL hansen's and Type II lepra reaction is about 44%, which includes ocular muscle weakness, lagophthalmos, ectropion, trichiasis, entropion, blocked nasolacrimal ducts, pterygium, impaired corneal sensation, corneal opacity, corneal nerve beading, punctate keratitis, iris atrophy, blindness, episcleritis, scleritis, iridocyclitis, iris atrophy and decreased visual acuity, corneal ulcer and cataract.
8) and Pterygium, growth of conjunctiva extending towards cornea (Fig.
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