Does anyone out there have any experience with Super Focus glasses? If you haven't heard of them, this is the pitch. They are for persons with presbyopia, that condition we "middle aged" folks get where we lose our ability to focus at various distances. The glasses are constucted with a hard lens in front, a flexible membrane in back, and a clear fluid in between. The curvature of the membrane is altered by a slide on the bridge of the glasses allowing focus from close-in to infinity. My impression is that this might help bring a pistol front post into focus or better yet, improve the sight picture with rifle peep sights. Any feedback on this product would be appreciated.