MAPT and Schnyder corneal dystrophy: Considering single diagnostic subgroups, in SCD patients plasma p‐tau217 levels were significantly correlated with Aβ42 (ρ = −0.393, p = 0.018), Aβ42/1–40 ratio (ρ = −0.558, p < 0.001), and p‐tau (ρ = 0.447, p = 0.006) and p‐tau/Aβ42 (ρ = 0.537, p = 0.001; Figure 2B).