I needed trifocals for work, but never could get used to them. So I had special bifocals made for computer work that had mid vision lenses on top and reading on the bottom. I only wear single vision glasses play golf though and the ball is in focus at set up.
I recommend you do the following: At set up, have someone measure the distance from your eyes to the ball. Do it for putter through driver to get a range. Then give this info to your optometrist. What they can do is create a bifocal for address and distance that will fit this purpose. I did this for the special work glasses by measuring the distance to the screen I was working on. I took them off when walking around and put on my regular bifocals.