Study of induced astigmatism before and after pterygium excision surgery.

Dr. Nizamuddin; Dr. Anand Goyal; Dr. Jaishree Singh

Volume : IX, Issue : VIII, August - 2020

Study of induced astigmatism before and after pterygium excision surgery.

Dr. Nizamuddin, Dr. Anand Goyal, Dr. Jaishree Singh

Abstract :

Background: Pterygium is a wing shaped fiovascular growth of subconjunctival tissue encroaching upon the cornea from the either side within the interpalpeal fissure area inducing significant astigmatism. Surgical intervention for excision of pterygium leads to reduction in astigmatism which significantly improves vision. Aim: To study the changes in corneal astigmatism before and after pterygium excision surgery. Material and Methods: The study was carried out on 109 eyes of 109 patients, who had primary pterygium and were admitted in the Department of Ophthalmology, Govt. Medical College, Kota, Rajasthan and underwent pterygium surgery during period of January 2016 to December 2019. All patients underwent preoperative assessment for visual acuity, refraction and keratometry. After pterygium surgery patients were reassessed for visual acuity, refraction and keratometry on 1st , 7th , 14th and 30th post operative day and the results were analyzed. Results: Mean astigmatism preoperatively was found to be 2.37 Diopters (D) in type 1, 4.16 D in type 2 and 6.75 D in type 3 pterygium which subsequently decreased to 0.65 D, 1.10 D and 1.65 D respectively on 30th post operative day and showing change of 1.72 D, 3.06 D and 5.10 D in mean astigmatism correspondingly which was statistically significant(paired t-test, p<0.05). Conclusion: Pterygium causes significant corneal astigmatism, which hampers vision of the patient. Excision of pterygium leads to statistically significant reduction in astigmatism, which improves vision significantly.