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

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.