Idk about prevagen but my opthomologist definitely said any generic of preservation is very good, and artificial tears with flax seed oil will definitely relieve dry, itchy “sandy eye” feel. Idk if he really believes that or not but I thought I’d give some drops a try. Last time I tried artificial tears, it burned like soap so I hope it’s not a waste of money.

Oh I looked it up, there may (study funded by the industry) be a basis for that. Medical News Today