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Introduction: The study was conducted with the objective to compare the visual acuity and astigmatismbefore and after pterygium operation using diamond Burr.Materials and Methods: This study was conducted as prospective follow up study on patients withprimary pterygium inducing visually significant astigmatism. Visual acuity, K reading, astigmatism wererecorded before surgery and at 1week, 6 week and 12 week following surgery whereas corneal clarity wasassessed post operatively. The pterygium remnant tissue over cornea was polished using a Diamond Burr.Result: Mean age of patients was 46.88 10.61 years. The study was comprised of 77.1% females.Mean BCVA (LogMAR) preoperatively was 0.260.19 whereas that at 12th week was 0.120.08 and theimprovement was statistically significant. The mean astigmatism also reduced significantly (pa significant improvement in K average and corneal clarity at various follow up was observed (pConclusion: Pterygium surgery with diamond burr application for corneal smoothing, significantlyimproves the visual acuity, corneal keratometry and pterygium induced astigmatism.Keywords: Diamond Burr, Visual acuity, Pterygium, Keratometry.

Preoperative and postoperative evaluation of corneal astigmatism after pterygium operation using diamond Burr