never heard of such a thing, ive had my current pair for over a year with no issues & my gf has as well.
How'd you get your pupillary distance? Most docs and brick/mortar stores seem to be stingy with that info.
I actually get my prescription at walmart. They give you all the info. I think you can also calculate it by using a ruler and mirror.
I can do your measurement for you. If you want to do brick and mortar my friend can help you out. Value optical in Clive.