There's the 20/20/20 rule (every 20 minutes, look at something 20 feet away for 20 seconds) that's cited often. I started to have similar issues, and my optome

There's the 20/20/20 rule (every 20 minutes, look at something 20 feet away for 20 seconds) that's cited often. I started to have similar issues, and my optometrist set me up with some reading glasses optimized for how far away I usually sit from my monitor. They have eliminated a lot of the eyestrain issues I'd been dealing with.