EDN1 and glaucoma: Consistent with our previous study [13], in the total cohort (glaucoma and control), the ET-1 plasma levels exhibited a moderate positive correlation with GLV (r = 0.321) and cup volume (r = 0.313), and a negative correlation with GCC thickness (r = −0.333) and with the VD of PeriONH TempSup (r = −0.382) and PeriONH TempInf (r = −0.359) (Supplementary Table S4).