Prizm Sapphire 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. Engineered for bright sun, Sapphire Iridium reduces glare and balances light transmission to help you maintain color recognition.