Photochromic lenses are the best the all-round option and work in almost every condition from low light overgrown rivers to bright sunshine. Photochromic lenses darken on exposure to UV radiation. Photoflite series lenses start very light and darken very linearly when UV light is increased.
For use on top of prescription eye wear. The first choice for people that has to wear prescription glasses. Comes with either copper or yellow lenses. Supplied in box including neck cord and rinsing cloth.