MEASUREMENTS INCLUDES: NEW CADDIS frequency LENSES Best-in-class frequency lenses. Technology is infused in + blocks 45% of harmful blue light. CR39 lens Superior hard coat for anti scratch durability Anti-reflective coatings to mitigate reflections and glare. Super hydro-phobic and oleo-phobic coatings for anti smudge Handcrafted acetate designs utilizing state of the art CNC and finishing for fit, function, and durability. Our D28 is our largest frame that looks great on both women & men looking for a statement - at work or going out at night. These will not fold 4 different ways into a square the size of a Starburst. We have admiration for substance, and our D28 model is a signature piece. Made of 100% Acetate and cut with exact precision. We lazer etched “Izquierda” and “Derecha” across the tops so you don’t forget which side is the left, and which side is the right. All D28 readers come with our proprietary blue light blocking frequency lenses. At no extra cost to you. This technology: - Is infused into the lens. Not coated on. - Blocks 45% of harmful blue light at, and surrounding, the most harmful wavelength (455 nm). This is more than other brands. Ask and you'll see. - Is in a nearly clear lens (which is hard to do).