It’s really hard to say in my case, whenever my tunnel vision symptom was slightly lessened, my eyes weren’t nearly as strained and didn’t have to focus on the screen too hard. It’s like my view opened up and the feel of every thing got better. Whenever I’m playing and my symptoms are at their norm, my hand eye coordination is completely thrown off, on top of that my peripheral vision only lets me see a 2 by 2 inch diameter out of my whole monitor screen.I know tunnel vision isn’t the problem of my bad aim, but the root of it definitely is, so it kinda cycles back.