I too am one of the optically impaired & need magnification to do a
lot of things.
I wear trifocals full time. For a while I used an Optivisor, but
found it sort of like looking through a tunnel & a real PITA to
converse with anyone that came in to talk about something. After a
couple of years, I found the 'Opticaid Clip-on Magnifier'. They're
The clip on portion is made of spring wire, everything else is made
of clear poly carbonate or some other plastic. They're very
lightweight, you don't notice the weight when you're wearing them &
because everything else about them is clear or small, it isn't
distracting when they're on. In addition to that, they can be flicked
up completely out of the way with out disturbing your glasses.
Another nice thing about them is your field of vision is not
restricted. You can look over them, under them, & around them &
observe what's going on around you or where that tool is on the bench
without having to tilt you head way back. They come in 6 powers, 1
1/4, 1 1/2,2, 2 1/4, 2 1/2, & 3 1/2 with focal lengths of 4 - 20
They're price around $19. I got mine from Stuller. They're shown on
page 324 in Stuller's Vol 43 Tool Book.
Usual disclaimers, just a happy customer.