MAPT and red-green color blindness: GVBs have been reported in glial cells with tau pathology in patients with Pick’s disease, familial FTD and a CBD/PSP-like tauopathy [50, 69], but not in cases with PSP, parkinsonism dementia complex of Guam, pallido-ponto-nigral degeneration patients [60] and aging-related tau astrogliopathy (ARTAG) [45].