Hi - I got fantastic specs last October from Cem Optik, on Attaturk Caddesi (quite central, on a corner on the right hand side as you drive down, but before Carrefour). I have complicated varifocals. They also organized the best eye test I have ever had. So I found the prescription better than I had in UK. I got a pair of top of the range bendy specs, with reactolite lenses, and a pair of prescription-in Oakley sunglasses for winter skiing - the two pairs for just over £500 including the test. This may sound expensive, but I would have paid well over £400 for the first pair alone in UK which would have had lower-spec frames; and great service. The female manager speaks excellent English, and we were recommended to go their by Turkish friends. good luck! Mrs Scorcher