Seriuos answer: Try doing the things that casue it but only with your right eye open. Do this for a few days and see what happens. If you still get headaches, do it for few days with the other eye. This will at least show you if it's an eye and which one is causing the problem.
If it is an eye, then you probably need a laptop with a decent graphics card and a dual core so the screen refresh is massively increased and your brain doesn't register it.
All part of the aging process