Variable Focus (Independently For Each Eye) Dial Glasses In Britain (That Work)?

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Hello.I have 'conflicting' eye focus issues and wondered if anyone used and had a vendor for working pairs in Britain? Rather than describe a fixed distance to the optometrist and then deal with the conflict I think dial Glasses might sort me out.If there is a way of getting the original American ones or someone knows a link to a good pair (conflicting reviews on amazon) then I'd be greatful.

 

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Bought the 'generic' brand on amazon just to try.Amazingly they work after a fashion but only in one spot.I imagine the american originals were better as the concept works but not useable in this instance.