Anti blue light lenses: blue light blocker and UV400 lenses, anti-reflective coating, made of explosion proof PC(polycarbonate) material, high light transmittance with unnoticeable yellow tint to minimize color distortion, help you filter and block out harmful blue ray, provide UV400 protection, protect your eyes. Quality frame: fashion style square tritan frames with adjustable spring hinges and one-piece nose pads provide durability, flexibility and comfort for long-term wearing, it also fits perfectly and look good on any face. Blue light blocking glasses: reduce glare, fatigue, headache, eye strain and dry eye, protect your vision and help sleep better. Suitable for men and women, especially for those people who need to be in front of their digital screens for 6-8 hours a day. Package list: 1 pair of anti blue light glasses for reading digital screen + 1 quality eyeglasses eyewear case + 1 microfiber cleaning cloth. This package is also suitable as a gift for your family and friends. Customer service: if you have any questions about blue light glasses or blue screen glasses, please feel free to contact the seller Yuluki, we will solve the problem until you are satisfied. You have no risk to try!Color: Tortoise Manufacturer: Yuluki Package Quantity: 1 Part Number: B200801-DEMI-0- Size: Without StrengthWhy do we need to block harmful blue light?We spend a lot of time staring at screens—whether it's a laptop, smart phone, television, or tablet. However, the harmful blue light is emitted by most electronic screens. Such blue light can cause a wide range of symptoms like blurred vision, dizziness, eye strain, double vision, dry eyes, or headaches.Blue light or blue screen glasses are outfitted with lenses that limit the exposure to the blue light of digital screens.Yuluki glasses can protect your eyes by filtering harmful blue ray. We focus on blue light blocking glasses and bring you a better enjoyment of digital life.PRODUCT DIMENSIONSLens width: 2"(51mm)Frame width: 5 5/8"(143mm)Lens height:  1 5/8"(41mm)Frame height: 1 5/8"(42mm)Bridge (DBL): 13/16"(20mm)Temple length: 5 13/16"(148mm)PRODUCT INFORMATION1 Pack Blue Light GlassesTritan FramesPolycarbonate LensAnti Blue RaysAnti GlareUV ProtectionYuluki blue light filter glasses are ideal for you to block any harmful blue light while using an electronic device, such as computers, pads, phones or televisions. NOTEIf you have any problems with our items or services, please feel free to contact usWe will do our best to solve any problems and provide you with the best customer services