Also harder to (visually) focus. Fresh air cleared out a bit of my headache but after being on my laptop for a good 45, 50 minutes everything looks a bit soft even with my glasses on. Kind of flattened, a bit like seeing images on a computer screen. You can fake a little depth mentally but your eyes are still focused the screen distance away.
"[Growing up] is hard and nobody understands." // https://www.homestuck.com/story/2391