Turning to the light and Cheap Oakley Sunglasses, the following three types of light is very important: direct light - direct light from the light source (eg the sun) shines the light of your eyes. Too much direct light will make the details of the surrounding environment becomes obscure, but also make it difficult to focus attention. Reflected light - reflected light are often based on the form of glare. The reflected light from a reflection on the object to reflect light back to the eye. With direct light, strong reflected light makes it difficult to perceive the details or look directly at an object. Snow, the water, glass and white sand are good reflecting surface. Diffused light - the light diffusion alone rebound and dispersed towards many directions, and thus seems that this light does not have a specific light source. A typical example of the diffuse light over the glow of large cities. Difficult to determine its single light source. There is no direct light source, we can see things, this is the diffuse light of the credit. Quality sunglasses can eliminate UV spectrum to reduce the direct light, so that people feel comfortable, and the other but also to eliminate or reduce the reflected light (depending on the reflecting surface). An interesting characteristic of the light is polarized. When the reflection from some surfaces, such as water, light polarization. Due to the polarizing properties of reflected light, polarized Cheap Oakley Dispatch Sunglasses can eliminate the light reflected from the surface of the water or similar reflective surface. Staining lens, sunglasses lens color lens which parts of the optical absorption spectra. Manufacturers use different colors to use. The gray is a good general color, reduce the brightness at the same time, its color is minimal distortion. Grey lenses provide glare protection, making it the ideal choice of driving and general use. Yellow or golden lenses can reduce blue light, while allowing other frequencies of light through the lens. Blu-ray can rebound and scattered a lot of light, so it can produce the effect of glare known as blue haze. In fact, the yellow can eliminate the blue part of the spectrum, which makes all objects appear bright and clear. This is why the anti-snow blindness, sunglasses general is the yellow. Color perception of these colors will make a little distortion, and therefore this type of color of sunglasses is not suitable for those who need to accurately identify the color of the activities. Amber and brown is also a good general-purpose color. They can reduce the glare effect, the UV outside its unique molecules can absorb higher frequency colors such as blue. Studies have shown that receive long-term near-ultraviolet light (such as blue and purple) irradiation is one of the risk factors of cataract. In fact, the Sun of Tiger, there is a special version called Blue Blockers, with the patent. These Cheap Oakley Sunglasses_sitemap with yellow lenses will result in color distortion, but will increase the contrast and sharpness. Green lenses filter out part of the Blu-ray, and also to reduce the glare effect. In all color lenses, green lenses provide the highest contrast and greatest visual sharpness, so popular. Green or blue background, purple and rose-colored lenses can provide the best contrast of objects. Thus, they are a good choice for hunting and water skiing.