[TheOldLady]

Here's another one. I was searching for them on Bing, and it's appalling how many truly lame ones have been published on the Intertubes for all the world to see.

You cross your eyes? I peer off into the distance (uncross them).

[ApplegateRanch]

Dem thingies doesn’t work for me; haven’t since 1972 or 3 when a neuritis damaged my retina. Youse needs central vision in both eyes to make those work.

Imax works fine; and blue-green glasses work to an extent...though I can’t ever know if that is the same extent as a normally sighted person or not.

And if you’re really an O.L.D. lady, then you should remember the eye-crossing ‘secret’ images in the back or center of comic books. I think Mad used them now & then, too.