CCVOO Satisfaction Assurance: If you have any questions with the glasses, please feel free to contact the seller , we will provide you with a satisfactory solution. Polycarbonate Clear Lens: Professional anti reflective transparent lenses, restore true colors, accurate magnification strength, give you a clear vision. Lightweight TR90 Material Frame: Strong, durable, flexible and comfortable, suitable for long-term wearing; Classic design, elegant appearance, leading the stylish trend. Reduce Eye Strain, More Restful Sleep: CCVOO blue light readers provide all-day protection, no worry about eye fatigue, migraine, headache and blurred vision anymore, you can enjoy digital time. Bluelight Glasses: Blue light blocker with UV400 protection, anti glare and cut more than 95% of harmful blue light; Reduces eye strain & discomfort caused from long periods of reading, using pc/ tv/ phones/laptop and work under fluorescent lights.