How feasible are eye tests to possibly detect for Alzheimer’s?

It’s much cheaper than PET imaging and it’s done in a way where people just, as part of their normal daily lives, go in for screenings when they go in for eye-glass testing, for example. We go to optometrists on a reasonably regular basis (1-3 years), so my hope is that these contacts, with an optometrist or ophthalmologist, could be the point of contact where we could screen many many people at a population level that’s affordable to screen for the disease as well.