I've tried varifocals & bifocals, but just can't get used to them, therefore have both reading and distance glasses, but get really frustrated swapping them over. I wear my reading glasses around my neck with a cord, but apparently this ruins them. I use these for reading, computer work and my mobile phone, reading labels and instructions, any close work like threading needles, eyebrow plucking, applying make up and endless other things, whereas my distance ones mainly for watching telly and driving, therefore these Eyejusters seem to be the ideal solution!