Imported Metal frame Plastic lens Non Polarized Lens width: 54 millimeters Bridge: 19 millimeters Arm: 144 millimeters BULLABULLING READING GLASSES CAN HELP YOU PROTECTION FROM BLUE LIGHT Every day our eyes are being exposed to harmful blue light that's emitted from electronic devices, such as cell phones, tablets, televisions, monitors, and laptops. Hours of blue light exposure can cause eyestrain. As we spend more time looking at digital screens it's important to take proactive steps by wearing blue light blocking reading glasses.