POC places a strong emphasis on optics and offers a variety of lenses for their DO Half Blade eyewear. The interchangeable Zeiss-produced lenses enhances contrast and offers sharp distinction of surface and surrounding conditions on the road or trail. The various vented, polycarbonate lens options offer differing degrees of Visible Light Transmission (VLT), and Ripel treatment keeps fog, dirt, and grime off the lens, while allowing water to bead up and run off. The lens won't shatter and is as scratch resistant as possible with the polycarbonate material.