Most eye glass places will adjust for you. You dont have to show proof of purchase. You should be able to go to a convient place. As for Costco, I have never had that issue here. I just avoid weekends and lunch time. You should stay until they are done correctly and your satisfied
Went to Target took me 2 times in out in about 10 minutes. they told me to wear them for about a week let me get adjusted make sure they weren't too tight to come back if they were they adjusted it warn again and they were perfect.
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