A few weeks ago I decided to play around with varying strengths of reading glasses to see if this could relieve eye strain.
Have had to change my desk setup to move the monitor closer for the weakest +0.25 diopter (I don't actually need glasses at all) but have had zero eye strain in the last few days, even with very infrequent breaks. +0.75 diopter turns out to be perfect for books and iPad use.
Only time will tell, but I think this could be a great improvement to my workflow.