In life, there are too many light sources to produce harmful light, especially sunlight; the light emitted from the sun: visible light, infrared, ultraviolet (Ultraviolet) and so on. In the case of ultraviolet rays on the human skin, eyes, etc., causing serious damage; too much, visible light (Visible light ray) (380 ~ 780nm); ultraviolet light is divided into UVA, UVB, UVC (310nm) or more, cyan ( Blue light) UVA, UVB, UVC is harmful light. If it is damaged by long-term exposure, UVB has serious influence on vision. (Tanning Ray) is the light that burns black skin. Most eye corners absorb this kind of eye. UVB light, so be sure to block this light source. Because polarized sunglasses have the function of polarizing light, they can block all harmful light without affecting the transmission of visible light, and can truly protect the eyes. In addition to the basic UV protection function, polarized sunglasses also have anti-glare, reflective light on the road surface, scales on the water surface, etc., suitable for driving, fishing, traveling, and daily wear.