I never thought that a pair of glasses could have three functions: blocking blue light from computers, blocking ultraviolet rays from sunlight, and filtering glare from car lights! The magnetic metal frame does not feel heavy at all, the lens can be changed in a second, the two frames can fit perfectly, and the scratch-resistant resin lens is very transparent. I used to wear at least two sets of glasses when I was driving, but now I feel relaxed and convenient with this pair of glasses, which is great! I will recommend it to my friends!