الفهرس 
PRIMARY PTERYGIUM
PATIENTS AND METHODSOnly 14 pages are availabe for public view
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Abstract
Pterygium is a triangular growth of fibrovascular tissue that extends from the conjunctiva onto the cornea . The overall prevelance rates range from 7.0 to 31% in various populations around the world.many therioes have been proposed to explain the etiology of the pterygium and the pterypium is considered tobe a most keratoconjunctival degeneration . However , recentley , the most accepted theory is that the pterygium is considered to be due to limbal stem cell dysfunction .the most difficult problem faced in the management of pterygia is their frequent and aqqressive recurrences following surgical removal . There is no surgical produce or pterygium removal to be universally accepted as being perfect . With subsequent recurrences , the rate of information is quicker , the inflammatory process is more intense , the pterygium becomes larger than the original one. Many incidence of recurrence with little or no complications . Aiming to minimize the postoperative high recurrence rate of pterygium , many adjunctive therapies have been tried includes : b-irradiation , thiotepa, mitomycin c , cyro, cyanoacrylate, corticosteriods, excimer laser and argon laser photocoagulation.