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Yes, I can see the merit in your ideas here. I don't often wear my glasses except when I am reading on the computer, so another pair would be too costly for me with that kind of use. If I got a second pair at half off I would think about it and if it were 2 for the price of one I would jump at the opportunity to get such a deal. Meanwhile I just stick with 1 pair. Thank you for bringing such a wise point to my attention.