Prizm Torch IridiumPrizm is a revolutionary lens technology that enhances contrast and visibility over a wide range of light conditions. These lenses have been engineered to help you perform over a wider range of lighting conditions, reducing the need to switch lenses as lighting conditions change. Iridium lens coatings allow you to tune transmission for specific light conditions. Each lens coating is specifically formulated for optimum balance between glare, reflection, light transmission, and absorption.A neutral, grey base lens with a mirrored finish ideal for medium to bright light. Torch Iridium eliminates 83% of ambient light and blocks 100% of UVA, UVB, and UVC light.