Every eyeglass lens has a measurement called the refractive index which indicates how much the material will bend light which enters it. In other words, it’s the ratio between the speed of light through air and the speed of light through whatever

This past April, Snapchat released the second version of their Prescription Snapchat Spectacles.  With this new iteration, it seems that Snapchat has addressed most of the complaints and problems that people had with their original release. If you haven’t heard about the

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