الفهرس 
Review of literature
Degenerative theoryOnly 14 pages are availabe for public view
 |  | from | 128 |  |  |
| | | from | 128 | | |
Abstract
Reviewing the literature about the aetiology of pterygium, many theories were raised up but the most established theories are the inflammatory theory ani the degenerative theory. Pathologically pterygium was described to show pigmentation throughout the epithelial layer, tubular down-growths of cylinderioal cells form pseudo-glands in the body of the pterygium; base¬ment membrane became thinned ani irregular or completely destroyed; fragmentation ani destruction of the Bowman’s membrane. The SUbepithelial ti6sue showed congestion of the vessels; ohronic inflammatory cells mainly lymphocytes. Collagenous fibres were irregula1ly arranged with clefts in between. Hyaline degeneration were prominent in the later stages. Many techniques for surery of pterygium were described and reviewed in this study. 30 Patients presenting with pterygium were included in this work, opeted Upon and some pathological studies were performed. Reviewing the literature and from the present stUdy, it can be conclUded that: 1- Lamellar keratectomy with bare scleral technique is a justifiable procedure in the surgery of pterygium and it gives good results.