NOIR Dark Amber medium sized fit over filters. These glasses have a visual light transmittance of 6%. VLT is the percentage of the visible spectrum (400 to 720nm) passing through the lens, weighted against the sensitivity of the human eye. The higher the VLT, the lighter the color and the more light passing through the lens. The frames feature a sleek modern look that will fit over fit over Rx glasses or can be worn alone. They provide superior peripheral coverage while also having a soft comfortable fit for the temples.