These Vise®s feature Blue Light Blocking lenses which help to reduce eye strain caused by LCD/Computer/Smartphone screens. These lenses help to keep your eyes relaxed and physically lower the stress of screentime, especially at night. About The Vise® Z87: features an all TR90 construction and tightly holds form and function together, as the Vise® Z87 meets ANSI Z.87 mass-impact requirements (and Z87+ with add on side-shields) featuring 1.9mm thick lenses to aid in protection against basic impacts and flying debris, which enables the Vise® to transcend just that of a regular pair of sunglasses.
