BDNF and NGF serum concentrations were not related to age in the whole glaucoma population (BDNF/age r2 = 0.004, p = 0.65; NGF/age r2 = 0.10, p = 0.08) nor in controls (BDNF/age r2 = 0.03, p = 0.52; NGF/age r2 = 0.02, p = 0.67). The gene discussed is BDNF; the disease is glaucoma.