NGF and glaucoma: Both NTs were not related to age either in all glaucoma subgroups (BDNF/age: early glaucoma r2 = 0.02, p = 0.59; moderate glaucoma r2 = 0.25, p = 0.06; advanced glaucoma r2 = 0.01, p = 0.65; NGF/age: early glaucoma r2 = 0.11, p = 0.33; moderate glaucoma r2 = 0.001, p = 0.92; advanced glaucoma r2 = 0.006, p = 0.81;).