Sunglasses can be divided into 1, 2, 3, and 4 categories according to the light transmittance of the lens. According to the standard, the light transmittance of sunglasses is divided into 4 levels, the higher the level, the higher the shading rate. And these 4 categories mainly correspond to 3 dif ...
Due to the strong reflection of sunlight on the snow, and the irritation of the eyes by the cold wind while sliding, it is necessary to have a pair of glasses to protect the eyes. Ski goggles should have the following functions: First, prevent the cold wind from blowing and floating on the ...
Nowadays, sunglasses are no longer just for sun protection and eye protection. The correct choice of a popular sunglasses will definitely make people look extraordinarily fashionable. sunglasses company, 1. The oval frame is also a popular model in 2019, and the handsome and comfor ...