[frereubu]

I don't know unfortunately - I just happen to have used an optician for years since buying my first set of glasses (Schuller Opticians in London) with just two branches, who uses Zeiss.

[AdamGibbins]

Good to know thanks, I'm in London so might give them a go sometime.

[frereubu]

They're not cheap, but it wasn't until I tried other options that I realised how lucky I'd been to stumble across them.