George, it makes my eyes hurt to even read about bifocals and confined spaces, under-dash work, welding...

Just for grins: my piano-tuner friend, Shirley -- always clever -- had eyeglasses ground with correction at the TOP (as well as the bottom), to ease working overhead. (Bi-bi-focals?) I'd like a pair about 1/10 of the time when working in oddball places. Seems to me that if anyone intends to live long, this is the kind of thing you would buy early and use often, rather than doing without, and later saying "Why didn't I do this ages ago?!"

Like a shop vac, air compressor, power thickness planer (oops! don't know the equivalent for you metals-oriented guys), etc. :-)