Analysis of retinal AT100+ p-tau forms was performed in a subset cohort consisting of AD (n = 6, mean age 80.67 ± 14.73 years, all females), MCI (n = 4, mean age 92.75 ± 4.99 years, all females), and NC controls (n = 9, mean age 81.22 ± 12.20 years, 8 females/1 male). Here, MAPT is linked to Alzheimer disease.