eye & head movements while watching computer bits

My mom noticed that when my son is watching the bits on the computer he looks at the screen very quickly and then either turns his head to the side or looks to the side. She said it almost looks like he isn’t looking at the screen, but you can tell he is just for a second. He seems to do this every time.

I can’t tell what he is doing because he is always on my lap so I’m just getting the back-of-his-head view. He loves learning so it isn’t that he is disinterested. I go through the slides quickly, so I don’t think I’m boring him. I know he is learning because he is telling me things that I showed him.

Anyone else noticed this?

Has your son had his vision checked? It is possible that he has an eye problem.