Skewiff - DS1 has a dx of nystagmus.
TH has lots of experience of kids with squints. The computer vision therapy is perfectly safe for all kids. Some of the exercises are acout tracking a moving object, some are about focussing near and far, and some are about going cross eyed and whatever the opposite is called.
You do this by wearing glasses with a red lense in one eye and a blue lense in the other. You can only see the square if you lookthrough both eyes equally. It starts off with the red and blueimage on top of each other, then as you can see that it moves apart. So the red and blue image are an inch apart and you have to somehow ficus your eyes so you can still see it through both eyes.
If you just look through one eye you can't see the square because it's printed half in red and half in blue.
Robin said this program has a 100% improvement rate - and a 94% success rate. The 6% who saw an improvement but not a full cure had all had surgery for squints.
For a while I thought DS wasnt going to be able to do it. And then just suddenly he was able to. And he says that yesterday his vision improved dramatically - but he has been doing it every day for about 35 days.
Anyway, I don't see anyway it could cause harm, because all you are doing is staring at a computer screen trying to see a square.