OX Legacy"Elite" Blue Light Blocking Glasses, Yellow Lens, Black Computer Eyewear plastic frame plastic lens non-polarized Lens width: 55 Blue Light Blocking Glasses Designed to Reduce Incoming Light from the Blue Light Spectrum, OX Blue Light Blocking Lenses also Block 100% of UV Light High Quality CR-39 Lens; Very High Optical Quality, Half the Weight of Glass, Highly Scratch-Resistant Perfect for Reading, Looking at a Computer or Phone, Watching TV, or Driving for Comfort While Reading, Looking at a Computer or Phone, or Watching TV Prevent Eye Fatigue and Eye Strain From Squinting at Bright Screens in the Evening