"Ivan Vegvary" wrote in message
...

"Richard J Kinch" wrote in message
. ..
BQ340 writes:

For example how would I specify a pair
of bifocals that give my say 3X at 2'?

Eyeglasses do not do that.

Reader eyeglasses do not magnify per se; what they do is move the near
point (how close you can hold something in focus) closer to your eye

snip

look for a special set of glassess called "maxTV" -- specifically these
things:
http://www.eschenbach.com/preview.php?pid=654

I bought a pair at Westec from Gesswein