The summer of 2019 has come. These days, it can be said that the sun is shining, driving, taking the bus, even if you are riding a bicycle, you need to find a pair of sunglasses to make a concave shape.
A pair of sunglasses looked simple, in fact, there are many doorways inside.
Written in front
In fact, the main function of sunglasses is to block the ultraviolet rays and protect our eyes. In addition, if the wind is blowing, some gravel can be rejected.
But some inferior sunglasses not only do not protect against ultraviolet rays, but also expose our eyes to more ultraviolet light. Inferior sunglasses filter out some of the light, causing the iris to open to receive more light, increasing UV damage to the retina.
The high-quality sunglasses will filter out 97% of the light, touch some reflective surfaces and the lake surface, reflecting a lot of light, such light will interfere with our sight, causing busy, a pair of good sunglasses, can be used Polarized black technology completely eliminates light.
Therefore, it is very necessary to choose a good sunglasses!