As a not quite middle aged dude, I only just now figured out how to see magic eye stuff. I tried a couple times in elementary school but didn’t get it so I stopped. Had a few drinks earlier, stumbled on some magic eye pic that I could see clear as day and it blew my mind a little
It’s harder than it was before I needed bifocals, but yeah.
Once you learn the trick of it, it gets easier to do.
I wanna say I was late teens/early twenties when they first started showing up in my area, and I stood in the store I first saw one for like a half hour trying to see the image. My vision was kinda bad across the board, even then. But I got the first one, which was a boat, and then flipped through the rest of the selection they had, maybe five or six different ones?
But any time I got new glasses, it would take a few minutes to adjust when I’d run across one again. Same if I needed new ones.
They really are fun