BLUE-LIGHT PROTECTION FACTOR (BPF™)
The Blue-Light Protection Factor is a scale to measure and grade the protection level for the eyes provided by lenses from damaging (HEV) Blue Light and UV Light. The BPF scale ranges from 0 up to 100, which corresponds directly to the amount of Blue Light being blocked – the higher the number the better. The BPF is about lens protection of the eye as Sun Protection Factor (SPF) is about sunscreen protection of the skin.