Abstract        Purpose: To investigate the role of postoperative topical 0.05% cyclosporine A (CsA) eye drops in the prevention of recurrence among patients with primary pterygium treated with bare-sclera technique. Methods: In this prospective randomized controlled study, 36 eyes (34 patients) with primary pterygium were randomized into two groups: Group I comprised 40 eyes (40 patients), and Group II comprised 40 eyes (39 patients). Bare sclera technique was performed in both groups. In Group I, 0.05% CsA was administered postoperatively at 6-hour intervals for 6 months, and Group II did not receive any cyclosporine treatment. The patients were assessed for recurrence, side effects, and complications at postoperative 1 and 7 days as well as each month during the following year. Conjunctival advances which showed a limbus higher than 1 mm were recognized as recurrence.

Keywords: primary pterygium, cyclosporine A, bare sclera.