My son is 5, and is high functioning. He is in pretty good health, aside from some mild asthma. His diet is fairly typical of a kid his age, though he loves milk to the point I wish we owned a cow.
Within the last month or so, I've noticed him every now and then, suddenly having this real quick back and forth movement with his eyes.. I cant tell if he's doing it on purpose or not - maybe he enjoys how it feels, or how things look when he does it? It only lasts for a couple of seconds. Last night we were sitting in his room, chatting before bed. While he was thinking of responses to my end of the conversation, he would start doing it. He'd stop and begin speaking. I don't think it would be a seizure if it's only happening for a couple of seconds, right? Maybe this is just a new "stim"?
Do any of your children do something like this?