There are many different stores and I know that frames vary in prices, but what about lens? I was talking to Hakim and he was saying that they have 3 qualities lens Zeiss that supposed to be the best and then I think diamond and a third one. I don't know what to believe. I don't know if glasses (lens) from city optical, walmart, hakim or lenscrafter are all the same or not. The Hakim store I went to a couple of times seemed like they were contradicting themselves, one said you need full rim glasses to have blue light protection another guy said I didn't.