When fishing on a sunny day with gray glasses: can completely absorb infrared rays, as well as the vast majority of ultraviolet rays, and will not change the original color of the scene. A gentle, natural color is a popular lens choice.

Green glasses for cloudy days: like gray glasses, they can absorb all the infrared rays and 99% of the ultraviolet rays, and the green and red in the light can be blocked, but sometimes the color of the scene will be changed after the green lenses. But because the green color brings people a cool and relaxing feeling, it is also good for eye protection.