[2 of 2 customers found this review helpful]
Comments about Calabria Readers Bi-Focal - 641 Black Sunreader:
I don't consider it a con, but the bifocal area is just a tad too high for me, being used to progressives. That said, the magnification is clear and precise and the view through the tint is good. These could easily be used as drivers if you need some assistance to clearly see the gauges - the cutoff for the bifocal is just about the top of the dash or steering wheel (as I sit), putting the gauges and controls in clear view. Drug store readers have a tendency to make me feel a little nauseous after a bit, but that does not happen with these.