Scratch-resistant coating and Anti-reflective coating are the most common lens coatings, which one you should take decides to the lenses of your eyeglasses, Scratch-resistant coating can be used for ordinary plastic, high-index, polycarbonate lenses, they make lenses become more resistant to scratching; Anti-reflective coating, it was used for improving both the vision through the lenses and the appearance of the glasses, you need them if you choose high-index lenses for your eyeglasses.