I recently broke the frames of my bifocals. Really aggravated about my eyesight. I use bifocals for driving, for distance (+2.5) and dashboard (roughly arm's length, +3.5), but I need about +4.0 for desktop computer, and about +5.0 for reading/phone/tablet/detail work. I find progressives unsuited for desktop computer due to the restricted size of in-focus area. Currently I carry around FOUR pair, the bifocals for driving, over-the-top sunglasses, +4.0 readers, and +5.0 readers.