High Quality Specialized in Single Custom Silk Screen Printing Short Military Lanyard for Uniform

The round frame is retro and temperament, with a clever design, simple structure and beautifully designed beams. Classic retro round frame sunglasses arrow glasses, novel design, good-looking, with it in the hot sun is not afraid of glare，Soft and comfortable temples and are not easy to fall off during exercise.The color of the sunglasses lens determines which parts of the spectrum the lens absorbs. Manufacturers use different colors to produce specific uses. 

1. Gray is a very good general color, which minimizes color distortion while reducing brightness. Gray lenses provide glare protection, making them ideal for driving and general use.

2. Yellow or gold lenses reduce blue light while allowing more frequencies of light to pass through the lens. Because blue light can bounce and disperse a lot of light, it can produce a glare effect called blue enamel. In fact, yellow eliminates the blue portion of the spectrum, making all objects appear bright and clear. This is why the snow-proof sunglasses are generally yellow. This type of color makes the color perception a bit distorted, so sunglasses of this color are not suitable for activities that require accurate color recognition.In accordance with international standards, sunglasses are listed as a category of personal eye protection products, because sunglasses are worn in the summer, the main function is to block the glare of the sun.