In abnormal SCD participants there were no significant correlations between tau plasma levels and CSF levels of Aβ42 (r = −0.082; p = 0.782), tau (r = −0.413; p = 0.142), and p-tau181 (r = −0.226; p = 0.436) after controlling for age, gender, and education. Here, MAPT is linked to Schnyder corneal dystrophy.