S Viemeister wrote:
Graham. wrote:
What's the best way of locking them in that won't invalidate
your guarantee from the optician?
Why don't they do this for us?
If I don't tighten the screws on my varifocals on a
weekly basis the RH lens drops out!

I had that problem, too - my current ones don't have any screws!
They're flexible, lightweight titanium.

Lindbergs then. I can't see the point TBH - yes, they last ages, but
relensing them is as expensive as a set of run of the mill frames.