According to Kaarniranta et al. [43], studies on AMD are “interesting opportunities to understand the early signs of AMD that might be associated with AD pathology as well.” According to Javaid et al. [44], eye examinations allow an earlier diagnosis of AD because Aβ plaque deposition and hyperphosphorylated tau protein first appear in the retina. This evidence concerns the gene MAPT and age-related macular degeneration.