I got my last pair of varifocals at a well known ( and heavily advertised) national optician. They were relatively cheap and I got money off another pair but I was never very happy with the quality of the lenses. So I've gone back to the local optician and have new specs with a better quality lens. I've just had them on for 24 hours and they are definitely an improvement. I guess the moral of this story is you get what you pay for.