I LOVE my Oakleys, but the only way I could get them was we had to adjust my astigmatism prescription, and I left out the bifocal part of it to save $$. Next time I am getting the bifocal...
My eye doctor did test me to see if I could deal with the adjusted astigmatism prescription - and while it did odd things with my eyes when I would change over to my cycling glasses that soon passed. The lack of a bifocal is really only an issue if I need to read something - but I just take off my glasses for that. I am quite near-sighted myself though I don't know what my prescription is.