الفهرس 
Introduction and Aim of the WorkOnly 14 pages are availabe for public view
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Abstract
Fifty two eyes of fifty patients with pterygium either primary (30 eyes of 29 patients) or recurrent (22 eyes of 21 patients); were selected from patients with pterygia attending the Out-patient Clinic of the Ophthalmology Center, Mansoura University. Cases with the diseases affecting corneal topography were excluded from the study. Twenty five healthy normal eyes selected from the contraleteral non ptergium eyes of the pterygium patients were examined as a control group. Computer assisted analysis of corneal topography using computerized videokeratoscope (Tobographic Modelling System II) was performed to all affected and normal eyes of these patients. Marked corneal topographic alterations were found in pterygium affected eyes when compared to contralateral healthy eyes. The steepest mendian of eyes suffering from primary pterygium (44.87+2.1 D) was insignificantly different from that found in control eyes (44.47+1.27 D). On the other hand, the steepest meridian in eyes suffering from recurrent pterygi um (47.25+5.2 D) was significantly higher than the corresponding values in primary pterygium or control eyes. The contribution made by increased corneal scar at the corneal periphery may be important in increasing astigmatism in these cases.