My eye doctor told me to follow the 20-20-20 rule, and it changed everything. I used to power through like you, but my eyes would get so tired lol. Now I look at something 20 feet away for 20 seconds every 20 minutes. It lets your eye muscles relax, so when you go back to work, you see details better. My accuracy went up a ton, and I don't get headaches anymore. Seriously, try setting a phone timer, it's a game changer.