Feeling dizzy while looking at iPhone and laptop?

Two days ago I was on my laptop, iPhone, and TV. I started feeling horribly dizzy so I stopped and didn't use my phone or laptop just the tv the next day. Today I use my iPhone again and I'm starting to feel a bit dizzy again. My eyes also hurt when I move them around. What could be causing this?

You're probably staring at the screens too long.

Welcome to the 21st century

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