My brother had no line "trifocals" and it almost drove him insane. He went back to his bifocals and he loves them.
I have glasses for only far vision. I have to take them off to read or I can't see up close. Wouldn't know about bifocals.
If I come to that bridge, my opthalmologist told me she'd recommend weak "reading glasses" for me instead. She said I'd only use them when my eyes were tired and that I'd get a headache with bifocals because the far vision correction is so major as compared to the minor "tweak" for near vision.