My eyes are kinda horrible, but nearsighted. With my glasses off, I could probably work to 1/128 in metal. Have to get about 6 inches away from the workpiece, but I’ve had people ask if I want to get eye surgery, and I always say heck no. I like being able to see close.
As for having it under control, I remembered most of my lessons from my first cane, which were almost all of the “do as much as you can with square stock, or stock with at least one square side to measure from” flavor. I’m going to start rounding the shafts tomorrow, which will be interesting. Drawknife or spokeshave work uses back muscles (though I’ll see what I can do with just arms), so I’m going to have to approach it slow and easy, rather than trying to hog off big chunks of wood at once.