Are you referring to the "toric" contacts, which correct astigmatism, or are bifocal contacts different? I'm recently unable to wear the gas-permeable lenses I've worn for many years (too uncomfortable now), and have been trying various strengths of Acuvue soft lenses with little success so far in duplicating the excellent vision I had with gas-perms. My lens tech said that the toric lenses are directional (with a definite top/bottom/L/R), and they're a huge pain; they rotate into the wrong position frequently & end up being almost unwearable from all the positioning problems. Might want to check into that with your bifocal contacts, if they're not toric. I would imagine that bifocal contacts would be directional also. My opthalmologist appt is Tuesday; will know more then.
If you're afraid of butter, use cream. ~~ Julia Child
As you cook, you enjoy omniscience about food that no amount of label reading can match. Having retaken control of the meal from the food scientists, you know exactly what is in it. (Unless you start w/cream of mushroom soup, in which case all bets are off.) To reclaim control over one's food, to take it back from industry & science, is no small thing; indeed, in our time, cooking from scratch qualifies as subversive. ~~ Michael Pollan