Indian Journal of Ophthalmology

ORIGINAL ARTICLE
Year
: 2019  |  Volume : 67  |  Issue : 7  |  Page : 1036--1039

A comparative study of preoperative and postoperative changes in corneal astigmatism after pterygium excision by different techniques


Pragya Garg, Anshu Sahai, Mohd. Abid Shamshad, Lokendra Tyagi, Yamini Singhal, Shalini Gupta 
 Sahai Hospital and Research Centre, Jaipur, Rajasthan, India

Correspondence Address:
Dr. Pragya Garg
Sahai Hospital and Research Centre, SP-15, Bhabha Marg, Moti Dungri, Jaipur - 302 004, Rajasthan
India

Purpose: To study the changes in corneal astigmatism before and after pterygium excision as well as with differences between various surgical techniques (bare sclera, conjunctival autograft, amniotic membrane graft). Methods: The study population included 71 patients with primary pterygium who underwent surgery. The surgical techniques used differed among the study population. All the patients were preoperatively assessed for visual acuity, anterior and posterior segments, autorefraction, and autokeratometry. After surgery, the patients were assessed for visual acuity, autorefraction, and autokeratometry on day 5, 1 month, and 3 months and the results were analyzed. Paired and unpaired t-tests were used to compare the variables. The probability level of 0.05 was considered as statistically significant. Results: The reduction in the mean preoperative astigmatism of 3.47 ± 1.74 Diopters (D) to 1.10 ± 0.78 D 3 months after surgery was statistically significant (P < 0.0001). Bare sclera, conjunctival autograft, and amniotic membrane graft techniques exhibited changes in astigmatism amounting to 1.85 ± 0.88 D, 2.55 ± 1.26 D, and 2.67 ± 1.44 D, respectively. Pterygium excision surgeries using amniotic membrane graft and conjunctival autograft techniques were more effective than pterygium excision surgery using bare sclera technique in reducing astigmatism. Conclusion: Pterygium excision results in significant reduction in astigmatism which leads to improvement in visual acuity. Amniotic membrane graft and conjunctival autograft are better surgical techniques than bare sclera as far as reducing astigmatism is concerned.


How to cite this article:
Garg P, Sahai A, Shamshad MA, Tyagi L, Singhal Y, Gupta S. A comparative study of preoperative and postoperative changes in corneal astigmatism after pterygium excision by different techniques.Indian J Ophthalmol 2019;67:1036-1039


How to cite this URL:
Garg P, Sahai A, Shamshad MA, Tyagi L, Singhal Y, Gupta S. A comparative study of preoperative and postoperative changes in corneal astigmatism after pterygium excision by different techniques. Indian J Ophthalmol [serial online] 2019 [cited 2020 Aug 7 ];67:1036-1039
Available from: http://www.ijo.in/article.asp?issn=0301-4738;year=2019;volume=67;issue=7;spage=1036;epage=1039;aulast=Garg;type=0