I have been wearing varifocals for at least 10 years. I thin k they are great.

The problem with the computer is that you need to get the screen on a sort of chest high level, so that you are looking slightly down on the screen. If that doesn't work, you need to get the screen to a level that stops you having to bend your head back.

I have my screen set like that and I have no problems at all. I also have my keyboard at waist level, which makes it easy to type and see the keyboard.