The TSC was similar between the POAG (287.1 μm) and EXG (300.5 μm) groups (P = 0.16), while the PSC (P = 0.025) was significantly shorter and, vice versa, NSC (P = 0.0010) and NOSC (P < 0.0001) were significantly longer in the EXG group than the POAG group (Table 3). This evidence concerns the gene DCDC2 and open-angle glaucoma.