IDK about back pain, but eye exercises are a must for me much as I stare at screens. I saw a series of videos years ago (which I can't find online and don't re

IDK about back pain, but eye exercises are a must for me much as I stare at screens. I saw a series of videos years ago (which I can't find online and don't recall the name of) where author claimed focusing on fixed distance close objects so much is messing up our vision. The exercises included a few things, "palming" and some other stuff (which I tried once or twice and never stuck with) but one in exercise in particular I do it frequently, at least several times a week, especially after a hard session in front of the screen. The gist of the exercise is (and again, can't find video) is to go somewhere where you can see very far with an open horizon (the ocean, on building roof, something like this, the best thing you can find but less than ideal works as well). You then relax your eyes and sort of gaze off into the distance with hands lifted up next to ears, maybe 6 or 8 inches off each ear. Then you kind of flick your fingers around where you can barely catch a glimpse of the movement out of the corner of each eye while continuing a relaxed gaze out in the distance. Do that for a couple of minutes, rest and repeat several times. It really works for me and immediately when done the ability to perceive depth seems much enhanced and I can "see" better, or that's how it feels. I didn't do any quantitative trials, nor do I know of any, there might be some. But FWIW.