The lens features a light copper base with flash mirror coating
that block blue light. Sources of blue light include the sun, digital
screens, fluorescent lighting, and LED lighting.
Indoor/Outdoor Copper enhances the brightness of visible light
and uses the same technology as Bullheads precision lens,
but is good for indoor and outdoor conditions, it can even be
used to reduce eye strain when using computer.
Great option for indoor use but dark enough to be worn outdoors.