I am not an eye doctor, and I don't play one on tv.
A few years back I went to the eye doctor for a check up. She asked me what I did and if I work on computers, because I was going to need a stronger perscription. I told her I work on a computer for most of the day. After that she ended up mentioning that I should have a lamp on my desk if its not in a well lit room. She said it should be behind my monitor and the light source should be about 13% of the light in the room.
I am not sure how to measure this, but if I recall correctly, she said just guess. Well anyway, I thought I would mention this because from time to time people wonder about the strain playing on a cabinet causes your eyes to undergo. Incorperating this idea and the tinted plexi may make for a less strenous (on your eyes, at least) experience.
Just thought I would share.