The problem with varifocals is that they are a compromise; the alternative is to have a pair of specs for every occasion, which is largely impractical. For everyday use ie, walking about, looking at the odd bit of reading matter, driving etc they are very useful; for a particular task, such as sitting reading, they are best replaced with a fixed-focal length pair. I have a cheap fixed pair for using the computer, which are also OK for reading but trying to drive the car with a fixed pair was tricky because the instruments were out of focus. Turning your head to use the right bit of the lens becomes second nature to the extent that people don't realise they are doing it - I just checked myself using my laptop whilst wearing my varifocals; the outermost keys are very slightly blurred if I keep my head still and I found it hard work not to move my head to correct it as it's become habit. Given your time restraints I would suggest that you persevere with the varifocals for a while and get yourself a cheap fixed pair for when you are going to spend some time reading/playing with your phone. I think you'll find that, overall, the varifocals are more convenient if you can get used to them.