MAPT and red-green color blindness: Moreover, GVBs have been reported in various other disorders hallmarked by tau pathology, including corticobasal degeneration (CBD) [39, 67], argyrophilic grain disease [67], pallido-ponto-nigral degeneration [60], parkinsonism dementia complex of Guam [60], Down syndrome [9, 60], pantothenate kinase-associated neurodegeneration [16, 77] and post-fetal cases of Fukuyama-type congenital muscular dystrophy [58].