Sorry to hear about your problems Alsek. It's good to keep a positive
attitude about such things. I had detached retinas in both eyes when
I was 40 with a steady, but slow loss of vision since. I know it's not
the same as dealing with pain, and using a cane, but if one gives into
physical problems you loose even more.
I had a friend with arthritis so bad he couldn't get around without
crutches, his hands looked more like claws. But he stayed active
and kept busy where many would have given up to the pain.
It really makes one appreciate good health.