I got a pair of super-duper varifocals the other week, about £800. There were big words involved (several of them – once I saw the price – were for adults only). They're the ones that are supposed to blend focus seamlessly wherever you look. Honestly, I hate them. I'm at the age were I do the slide the glasses down my nose to read etc. so I get the point, but having to nudge my entire head around doesn't seem an improvement. Plus, because I'm really shortsighted (-7), I can only really use small lens, so there's limited area were the focus is correct and finding it is a pain. Price-wise, these were the most expensive in the price book (for super-duper varifocal and the thinnest lens). Because I'm worth it or something. The only really good thing is that if I rapidly swing my head in a bright room the swiftly changing focus makes me dizzy. I used to have to pay for dubious pharmaceuticals to get effects like that.
I also wasn't super-impressed that the minions in the opticians really seemed to know what they're doing when fitting (and they probably hate me, but I made the optometrist check) – they all looked like, and probably, were sales assistants who had done an afternoon's training in fitting.
Anyway, I don't like them so I'll probably just buy a spare vanilla pair online.