GFAP and Alzheimer disease: Representative microscopic images demonstrate the accumulation of 12F4-positive Aβ42 burden along with GFAP+-macrogliosis (marking reactive astrocytes and Müller glia cells) and IBA1+-microgliosis, as observed in retinas from MCI and AD patients versus NC controls [Fig. 1b, fluorescence and peroxidase-based staining are shown; extended data presenting tile images from central (C) and mid-peripheral (M) and far-peripheral (F) subregions are presented in Suppl.