The blue coating on the inside of Polarized lenses is an anti-reflection coating. This does not block vision but stops sun from being reflected back into the eye when at a side angle</br>Every model in the Ray-Ban collection is the product of meticulous?? original styling that translates the best of the latest fashion trends into an ever-contemporary look for millions of Ray-Ban wearers around the world.</br>Ray-Ban sizes refer to the width of one lens in millimeters.</br>Ray-Ban products sold by authorized sellers?? like Amazon.com?? are eligible for all manufacturer warranties and guarantees.</br>Protective case included?? cases come in a variety of colors.</br>Lenses are prescription-ready (Rx-able).</br>Ray-Ban products include an etched "on the left lens. The RB is not a scratch or defect.</br>The shape and curvature of these sunglasses may need adjustments. Adjustments should only be made by a professional.</br>Made in Italy or China.</br></br>Product Description</br></br><b>Ray-Ban Sunglasses??</b> style RB4195 Techlite is a rx-able lightweight rectangular plastic wayfarer with metal detailing on the top corners of the frame. The RB4195 features a saddle nose bridge for maximum comfort. The Ray-Ban logo is featured on the temples. Ray-Ban Sunglasses have scratch/impact-resistant lenses.</br><br/>http://www.amazon.com/gp/product/B00CFUJ3P66Exc