Hi Workaholic,

Welcome to NeuroTalk!
I hope you will find support and information here!

It's possible your upper extremity issues are from your neck, since it appears the testing has ruled out the ulnar nerve.

It's also possible you have some tendonitis in elbows, wrists, hands.

You knee pain may or may not be related to your upper extremity pain.

Do your vision changes seem abnormal for someone spending a lot of time looking at a computer screen? If this is the only time vision changes, it may be do to the screen and the amount of time spent looking at the screen?

It's interesting these painful/abnormal episodes occur while using the computer (your knee bothers while driving).

Have you paid attention to ergonomics when working at your computer for lengthy periods?

Do you have any rashes?
Any stiffness in joints?
Any swelling in joints where you have pain?
Have you seen a rheumatologist or an orthopedic specialist?

Others will be along with ideas, questions, support.

I hope you can get this sorted out.

Again, welcome!

To Our Healing,
DejaVu