Barry-xlovecam

1. I have multiple monitors on my desk so I move my focus between them a lot
2. My monitors average 32 inches away from my eyes
3. I wear glasses and I buy one pair a bit weaker for working at my desk

I think moving the focus of your vision matters a lot.
I have the optometrist check the strength of my prescription at 30-36 inches -- my average working distance for a lot of the day