This sounds awesome. How might it complement the "visual paired comparison" task of Zola et al. (2013) -- which has been commercialized by Neurotrack -- in helping to identify those at risk of dementia?
Zola, S.M., Manzanares, C.M, Clopton, P., Lah, J.J., and Levey, A.I. (2013). Am J Alzheimers Dis Other Demen. 28(2): 179–184. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3670591/