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Alright folks, thank you very much for your time, that about wraps it up. Jokes aside, it really does depend on what you’re looking for. However, regardless of your preferences, the first question is: do cheap prescription sunglass lenses actually protect your eyes

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

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