Judy -- I have a stool that goes up and down....the highest point is almost too high, my feet don't touch the floor. I lower it so I'm really comfortable, but yes, neck and shoulders hurt. After one of the big triangles (takes 1 1/2 hrs to do), I go it and do yoga stretches. Then back at it. Eyes --- yeah, I bought some cheap reading glasses at a higher # than I usually get, that helps (and lots of light).
I'd never heard of CraftOptics........
Just looked them up - sounds good!! Do you have any idea how much they cost?