Relation between different grades of pterygium and amount of induced corneal astigmatism

Abstract

Background: Pterygium is more prevalent among people exposed to ultraviolet (UV) light. It occurs more often in people who live in warm climates and spend a lot of time outdoors in sunny or windy environments. Objective: The objective of this study was to determine and the relation of different grade of pterygium with amount of induced corneal astigmatism. Methodology: This was observational study done in LRBT hospital Multan road LHR. A self-designed Performa was filled after clinically examining the patients. Frequency distribution/percentages of data were described, simple frequency tables and cross tables were formed to calculate the statistical results. Results: A total patients 50 with grades of pterygium and induce amount of astigmatism. There 31(62.0%) were male and 19(38.0%) were female and the mean age of the patient is 2.5. 21(42.0%) patients were grade 1 pterygium and 21(42.0%) patients were grade 2 and 8(16.0%) patents have grade 3 pterygium. The amount of astigmatism in grade 1 from 0.00 to 1.00 DC is 17(34.0%) patients, from 1.00 to 2.00 DC are 2(4.0%) patients and from 2.00 to 4.00 DC are 2 (4.0%). In grade 2 from 1.00 to 2.00 DC are 10(20.0%) patients, from 2.00 to 4.00 DC are 10(20.0%) patients and from greater than 4.00 DC 1(2.0%). In grade 3 from 1.00 to 2.00 DC are 2(4.0%) patients, from 2.00 to 4.00 DC are 4(8.0%) patients and from greater than 4.00 DC are 2(4.0%) patients. Conclusion(s): Result show that the present study verifies that as the pterygium reaches more than 1.00mm in size from the limbus it induce with the rule astigmatism and pterygium size increases, the amount of induced astigmatism also increases with direct proportion.