to all those who think you need to see a doc for a pd, i would say you are better off having a carpenter check it, all you need to do is measure if you need one zenni will send you for free. with a bit of patients (no pun intended) you can do a more accurate than the doc. as far as buying online i have done more than 50 pairs, the only ones that were done wrong were the ones i typed the wrong rx. and zenni gives you a full refund evan without reason within 30 days. glasses are from the highest marked up products out there , when you buy in a bm you are way overpaying