1、Reduce Visual Tiredness: Prolonged exposure to blue light can cause tiredness, blurred visual and headaches. Our blue light blocking glasses block blue light on computers, phones and TV, reducing visual tiredness. 2、Sleep Better: Exposure to blue light slows the production of related hormones, leading to sleep disturbances. Using blue light blocking glasses can improve your sleep. 3、High Light Transmission: Blue light blocking glasses not only block harmful blue light, but also have a high light transmission rate, allowing you to enhance your experience of using them. 4、Blue Light Test: The sensitive area of the blue light test card in the kit is very useful as the card will turn blue after use. 5、PC Material: Blue light blocking glasses are made of PC material, which is perfect for office employees or anyone who needs to look at screens all day. 1 x Glasses Box1 x Glasses Pouch1 x Glasses Cloth1 x Blue Light Filter1 x Blue Light Test Lamp1 x Blue Light Test Paper Item Type: Anti Blue Light GlassesMaterial: PCWeight: Approx. 120g / 4.2ozLength: Approx. 140mm / 5.51inWidth: Approx. 47mm / 1.85inIndividual Frame Length: Approx. 52mm / 2.04inSpacing Between Two Frames: Approx. 15mm / 0.59inLength Of Eyeglass Legs: Approx. 140mm / 5.51in