On Sep 20, 11:35 pm, Joe Pfeiffer wrote:
...
I didn't spend much time looking at Zenni, but neither of the magic
phrases "safety glasses" nor "Z87.1" seem to appear in the
descriptions of their prescription goggles.

Bifocal safety goggles with small magnifiers at the bottom are
available for around $10-$12 in welding stores. The best machining
arrangement for me is normal safety glasses plus an Optivisor set high
to act like upside-down bifocals. This keeps my neck at a more
comfortable angle when I lean over the machine to watch the threading
tool, etc.

jw