... Sports spectacles commonly known as PC bullet-proof lenses, light weight, and not easy to break, ... , good flexibility. 3) Yellow lenses: Strictly speaking, not part of the yellow lens sunglasses, because it ... does not reduce the visible light, but in the foggy and dusk, yellow lenses to increase contrast and ... film ", but also Some people choose to wear the yellow lenses to use as a decoration. 4) 100% ...