Dakura - Black/Yellow Lens. The Dakura's traditional wrap-around frame style is perfect for those who want tighter, smaller eyewear that looks great and is safety rated for work or play. Its flexible and durable black frame is equipped with soft thermoplastic rubber temple arms to create a comfortable, nonslip fit. Yellow lenses make dull, overcast conditions appear brighter and filter low levels of blue light. They also increase depth perception and contrast during dawn or dusk activities, including driving. 80% of visible light passes through this lens color.