Focal length is an issue. I use standard jewelers visor for close up BUT, the focal length is 8" (or 2.5" with the loupe down). They are now making an arms length(focal length) equivelent of reading glasses for computer work. They magnify just like reading glasses but, farther out and might just be the thing for gouging, planing, or even reading your computer screen. They're sold like reading glasses in 1.5, 1.75, 2.0, 2.5, etc magnifacations.
Regis