1, non-polarized sunglasses, generally only have the two basic functions of blocking strong light and filtering ultraviolet light, and its efficiency of filtering ultraviolet light is low. In our daily life, in addition to strong light and ultraviolet light, the light through the uneven road surface, water surface and other places will also produce irregular diffuse reflection light, so that the human eye appears blurred vision, fatigue.
2, polarized sunglasses can filter out this kind of light, only absorb the reflected light of the object itself, and truly present what you see, so that the field of vision is clearer, thereby reducing visual fatigue. In addition, polarized sunglasses due to its efficient filter layer, the UV blocking rate of 99%, can effectively reduce the damage of UV to the eyes.
3, When judging whether the sunglasses are polarizing mirrors, you can rotate the sunglasses clockwise up 45°. If the color of the lens changes at this time, the color returns to normal after the sunglasses are rotated back to the original position, then it can be determined that the sunglasses are polarized. And if no matter how to turn, you can not see the change in the color of the sunglasses lens, then you can judge that the sunglasses are not polarized.
Features of polarized sunglasses:
It can effectively filter the glare, scattered light, and refracted light, absorbing only the reflected light of the object itself, and truly presenting the thing seen. Therefore, polarized sunglasses can improve people's vision, reduce eye fatigue, so as to play the role of eye care and eye protection. In addition, the polarizer can also block all ultraviolet rays, so that the human eye is free from ultraviolet rays.