This product has the ability of filter intense light, and reduce reflect light : 7When driving under intense sunlight or at night, sunlight and the intense light reflecting on regular rear mirror, driver will feel dizzy. Blue lens has the ability to absorb intense light and reduce reflecting light. It can make the vision clear and soft, reduce the eyes fatigue, and effectively ensure safety driving. Ultra wide vision, no blind area, and make the driving safer : Double curvature blue lens add one more curvature on the original wide-angle lens, so it can widen the vision field and eliminate blind area. You are clear at a glance on the rear reflector, and do not need to look around, so it can reduce metal fatigue and guarantee the safety drivi