For the office cubicle there are stern limitations to size.
But if this is an At home situation..
Consider getting a 50 or 60 inch tv for the computer monitor, And simply move the table to the middle or back of the room.
This is the best for your eyes, because as soon as your eyes focus on objects @ greater than 1 to 1.5 meters, the lens is at configuration for infinity focus, which means the ciliary muscles (which contract the lens for near focus) are completely at rest.
Near focus is one of the major components responsible for eye strain..
Second to that is switching to a Dark background with Grey or lower contrast text.
This relaxes your iris, which is also a muscle.
View this image fit to fullscreen in a separate tab, and then tab back to your own configuration,
You should feel your eye suddenly relax.. and then suddenly on the base configuration, it will feel tighter.
The distance also helps with relaxing the lateral and medial rectus muscles responsible for "vergence" of the eye,
--- When you look at something closer, the eyes turn towards each other in a cross eyed motion to both focus on the object--
But for distance objects, these muscles also relax..
The combination of releasing all these muscles in a large screen long distance viewing situation greatly reduces strain..
The reason , this hasn't been discussed much in computer literature is primarily because large screens were not cost effective throughout the early history of computer use.
However, times are changing, 50 inch 4k tvs sell for $300 @ wallyworld..