Now I'm 30, and still have better vision than all of my friends, and don't require glasses, nor contacts. I even tried out things like having the looping pattern change its repeat length across frames, so I could watch a scene do things like the so-called 'Hitchcock effect," wherein things appear to spread farther apart, compress closer together, or both simultaneously, depth-wise. It took me most of a night to finally teach him to see them, but he got good like me at instantly snapping into the right mode, and we'd critique our work while in that mode, eyes uncrossed, pointing out things on the screen, discussing new ideas.
![turn your photo into sirds turn your photo into sirds](https://image2.slideserve.com/4042024/daugavpils-psihoneirolo-isk-slimn-ca-n.jpg)
I even got my friend into it, and we both started coding them up.
![turn your photo into sirds turn your photo into sirds](https://www.seoclerk.com/pics/000/724/140/1ec4027e0a66d2abfd1f5f7f3e498efc.jpg)
I did this off and on for a few months, experimenting with ideas. Then when I had enough frames (simple things, like squares and circles bouncing around the screen at different depths) I'd watch them play back for long periods of time, soaking in the novel effect. It would take awhile to render an image, and a lot of times I'd watch for the few minutes as it rendered, eyes uncrossed, image rendering in 3D for me.
![turn your photo into sirds turn your photo into sirds](https://img.izismile.com/img/img2/20090422/magic_01.jpg)
I got into stereograms in high school, and wrote my own staticy animated versions in Qbasic, which was all I knew at the time.