Returned a pair of silver line with uneven bifocils. At first I was told I could not return them and then was contacted with e mail to return them and sent a mail in address. That was very nice and it took a month for them to be returned. The drilling on the lens was exactly the same as the pair I sent back, exactly 1/16 off on exactly the same lens. That seems impossible, so here is what happened, they returned the origional glasses thinking I would not notice. This is at least ten pairs of glasses we have purchased with no complaints. Just so you know that I know. Will keep them.