I found these all very easy to see on my phone screen. By the end of the article I was already able to instantly "go 3d" without thinking "go cross eyed" or use

I found these all very easy to see on my phone screen. By the end of the article I was already able to instantly "go 3d" without thinking "go cross eyed" or use tricks like looking at my nose. The problem I think most people will have is screen size. If the screen is too big then going cross eyed will be harder and might cause strain. Straight eyed can be easier, but I still think there's a limit on screen size. Magic eyes when printed are about the right size for people's heads so just work. The second problem is the pictures look half as big as soon as you "go 3d". So although it's very cool and I buy the author's point that some pictures need the depth to make sense, there's always something lost from the full size picture. On my phone it made it like looking at a postage stamp! Still I might try it myself given how easy it sounds. I imagine even a slight bit of wind would make some subjects impossible, though!