Polarized lenses cat.3 : protection against 100% of UV rays (UVA, B and C). This sun protection index is the most versatile and suitable for all uses. Polarization of lenses is used to eliminate all reflections from surfaces such as roads, water, ice and snow. It also protects against glare and guarantees better visual comfort. (Polarization can make it harder to read screens as it creates a "rainbow" effect).