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Step 1: Grab your current glasses, your smartphone and a credit card (or any other plastic card that's the size of a credit card -- it's used to calibrate the app, not for payment). Then, plunk down ...

I enlisted a panel of glasses-wearers to shop on-site, test out frames and help determine the best places to buy prescription ...

Technically, the glasses have ... or plano-concave lenses, and can do so quickly (within 15 ms) and with low power consumption. The full whitepaper is available online and contains details ...

The ADD column of your glasses prescription indicates any additional lens power your eyes ... between one and 180 degrees. Online vision tests are not a replacement for an eye exam While online ...