Try the 20 20 20 rule. Every 20 minutes, fix your eyes on something at least 20 feet away for at least 20 seconds. This is fairly easy to implement if you do po

Try the 20 20 20 rule. Every 20 minutes, fix your eyes on something at least 20 feet away for at least 20 seconds. This is fairly easy to implement if you do pomodoros as you'll be stopping around then anyway. I get up, refill my coffee, stretch my legs, then go and stand at the door for a while and look at the trees or whatever for a little bit before going back and getting back to work.