Ok,I went into my TSO here in Richmond and explained that I wanted a pair of glasses made with the bifocal on the top and the regular glasses at the bottom (reverse bifocals if you will) and they made them for me. They work great not only for shooting but for work on the computer.
Now you have me wondereing.
One lens (say your dominant eye) to correct your near vision to focus on the front sight.
And the other lens to correct your far vision.
Might even make both-eyes-open shooting easier,