Based on some of the other reviews, I was hoping that it would make my eyes white. It doesn’t do this for me. Here’s what it does for me. When I first put the eyedrops in, they sting just a little bit. Then, for the next 15 minutes or so, they make my eyes redder than they were before. After that, my eyes are whiter than they would have been without Revitalize but not nearly as white as they get when I use Lumify. What I’ve been doing is using artificial tears early in the morning, Revitalize about an hour or two later, Lumify an hour or two after that (and especially before a meeting), and any of these three options later in the day if I need them. I’ve found that Lumify lasts longer if I’ve used Revitalize earlier in the day. Revitalize does make my eyes more alert/less tired, but the effects are subtle.