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On my hearing---I wore a ear piece for the radio for years while flying and I listened to everything around me with my right ear and radios with my left ear---today I make my wife sit, walk on my...

Dave--that should work--when I was flying, many guys would get bifocals---some would get trifocals--distant, instrument panel distance(aprox 30 in or so) and reading distance for instrument charts

I think the no line bi or tri focals are only good for desk /reading type work---in the real work world (away from a desk and chair) they are pretty well more of a pain than help--with them you need...

The welding magnifiers and off the rack reading glasses use the same numering systems--but both my eyes aren't thr same

i HAVE ALSO TRIED both the helmut magnifier and reading glasses at same...