I was at an ap meeting today and was standing for about 20 minutes, when I looked at the projector screen in front of me it looked like it was shaking. I have had a sinus headache for about 3 months now and have a small headache every day which usually goes away by night time. After I sat and relaxed I never noticed any other vision problems for the rest of the day, even when looking at a computer screen 15 minutes later. What could this be? Is it serious?
It could be the actual white pull-down screen shaking or the projector shaking. I would rule that out before being concerned it is YOUR vision. The headache may be completely unrelated but if it gets worse I would see a doctor.