I've had multi focal glasses for years now. I've tried clipons and transitions (change tint with UV exposure). Because the transitions would not darken in the car due to its UV stabilised glass, I've reverted to prescription multi focal sunnies, and non sunnies.
Whilst I can see adequately without the specs if not reading I just keep them on most of the time when awake. Sunnies travel either in my top pocket or in a hard protective case, and get switched over as required.
Multifocals can take some getting used to, I was lucky they only took a day or so, whereas a mate took 18 months.