Rudy Project Optics lenses are afocal sunglass lenses, optically correct and provide excellent clarity. The materials used in the RP Optics program are the finest available. Yellow lens transmit 87% of the light and enhance contrast and depth. They are ideal for early morning light and sunset or rainy days. Clear lens transmit 92% of the light. Designed for protection of the eyes from dust or other foreign bodies during sports activities.