I'm not sure if it's just me getting old, but I find that if I look at a screen while laying down (especially mobile, because typically that's the only type of

I'm not sure if it's just me getting old, but I find that if I look at a screen while laying down (especially mobile, because typically that's the only type of screen I can use while laying down) for more than a few minutes, I start getting a headache/migraine. As I got older, I have to follow a general rule of sitting in a proper desk and chair to use screens. Anything else doesn't really work for me.