I wore hard contact lens for quite a few years,w/o any problems but the Dr. recommended I switch to soft ones. I assume those are what you are trying Bear. When I went to the soft lens, I worked up to about 8 hours per day with them, but almost immediately they felt like there was sand grit or something in them. Steadily, the amount of time I could stand them dropped. When I reached two hours per day, I gave up on them.
I had eye surgery in 1995, and that was pretty good until I hit my fifties, now I need reading glasses - which I would have needed anyways. Also, in low light conditions, I need some light prescription. Nothing is perfect I guess, except youthful eyes.
Gary