PROGRESSIVE LEMON The CIL Lemon Progressive utilizes our High Contrast lens science. The top of the lens uses a high-intensity lemon filtration and through the progressive change in filtration the bottom allows for a splash of light into the eye for enhanced depth of field in low light. The top of the lens has a 70% transmittance while the bottom has a 95% transmittance. This lens has a variable filtration curve providing the athlete with a unique color management profile that has a high degree of contrast allowing for "Live Visual management."