Have a trouble with sleeping? Suffering sore eyes and headaches from long screen time? It is because exposure to harmful blue rays from phones, tablets, computers, TVs and modern room lighting ruins your sleep and causes your eyes' damage. SOLUTION: livho Anti-Blue Rays Computer Glasses’ Features: UV400 Protection Lens: offers a maximum protection with our multi-layer coating designed specifically to reduce glare, reflect blue rays away from the user and relieve long term eye strain caused by excess electronic device useFunction of Anti-Blue Rays: at least 90 minutes’ wearing of livho Anti-Blue Rays Glasses before bedtime leaves you free to watch TV and use devices without ruining your sleep Durable and Bendable Lightweight Frame Scratch Resistant Lens Product Maintenance: 1. Clean the Lens by Water or Alcohol prep pad and then Wipe Them by the Soft Cleaning Cloth Included Regularly. Do Not Use Other Chemicals to Clean the Lens, to Avoid Surface Broken. 2. Do Not Maintain the glasses in Such Bad Environment of High Temperature or Long Time Damp, to Avoid Deformation.