I ended up just having a set made for computer work, no bifocal/progressives. One reason was neither prescription was ideal. I do have to take them off to do other tasks, but for long hours at the computer, they are ideal.
I needed -4.5 normally but had some glasses made at -3.5 for monitor distance when old age set in. I use them for all other tasks indoors. I think my eyes adapted more and more to that prescription that I now only need the normal glasses when driving at night. In my experience it is more comfortable when in front of a larger monitor and checking designs, not just for the color shifts.
met vriendelijke groeten, Ernst Dinkla
spectral plots of +100 inkjet papers:http://www.pigment-print.com/spectralplots/spectrumviz_1.htm