Fig. 2From: Comparison of hyperdry amniotic membrane transplantation and conjunctival autografting for primary pterygiumKaplan-Meier survival curve of recurrence after pterygium excision. The cumulative proportion recurrence-free at 12 months was 0.95 ± 0.03 in the HD-AMT group and 0.78 ± 0.05 in the CG group (P = 0.003)Back to article page