[burning eyes, especially when I work on the computer for any length of time.]
Could be a bit of dry eye- and screens, color/contrast/brightness can make it worse, I think I read that we tend to blink less...

Were spine issues/factors ruled out for the other symptoms?
for legs, trunk etc.

I'll mention alternative options that you might want to research for more info about.. may not be specific to your symptoms but overall wellness/health.

acupuncture
chiropractic - eval/tuneup ( prior accidents, falls, sports, injuries)
far infrared - lights, pads or sauna
E stim devices/products
low level laser (aka cold or soft laser)

expert providers of course.. some might be worth a test or trial to see if any positives... If any do help, some of the products /devices can be bought online to use at home long term..