GSTP1 and open-angle glaucoma: In subgroup analysis, we found that GSTP1 Ile 105 Val polymorphism was significantly correlated with increased POAG risk in a recessive model (Val/Val vs. Ile/Ile+ Ile/Val: OR, 1.62; 95%CI, 1.00–2.61; P = 0.049) but not in other three models.