Well, my wife had an eye test in calis and bought glasses there and we thought we had saved a lot of Money.
However, they were simply not up to the standard we would get in UK, the anti-glare and lens coating was poor, and the frames weak.
I needed new galsses recently, and it was not much more in Specsavers! I actually bargained with them saying I had a prescription, and I could get them for much less in Turkey, got a discount!
Meldrew