Learn about tinted lenses.

Learn about tinted lenses.

The color of the sunglasses lens determines which parts of the light spectrum the lens can absorb.

Manufacturers use different colors to produce specific usage effects.

1. Gray is a good universal color. While reducing the brightness, its color distortion is minimal.

Gray lenses provide glare protection, making it ideal for driving and general use.

2. Yellow or gold lenses can reduce blue light, while allowing more light of other frequencies to pass through the lens.

Because blue light can bounce and disperse a lot of light, it can produce a glare effect called blue haze.

In fact, yellow can eliminate the blue part of the spectrum, which makes all objects appear bright and clear.

This is why the sunglasses for snow blindness are generally yellow.

This type of color can distort color perception, so sunglasses of this type of color are not suitable for activities that require accurate color recognition.

3. Amber and brown are also good universal colors.

They can reduce the glare effect. In addition to ultraviolet light, their unique molecules can also absorb higher frequency colors, such as blue.

Studies have shown that long-term exposure to near ultraviolet light (such as blue and purple) is one of the pathogenic factors of cataracts.

This type of sunglasses will cause color distortion like yellow lenses, but will increase contrast and clarity.

4. The green lens can filter out part of the blue light and reduce the glare effect. Among all colors of lenses, green lenses can provide the highest contrast and the greatest visual acuity, so they are very popular.

5. On a green or blue background, purple and rose lenses can provide the best object contrast. Therefore they are a good choice for hunting and water skiing.

Many sunglasses manufacturers use a process called constant density to dye their lenses.

This is the oldest sunglasses manufacturing process. The entire glass or polycarbonate mixture material has the same color. Therefore, in the process of manufacturing the lens, the color is inside the lens.

Plating a layer of light-absorbing molecules on the surface of pure polycarbonate is also a dyeing method.

The most common method of dyeing polycarbonate lenses is to soak the lens in a special liquid containing a dyeing substance, so that the dyeing substance will be slowly absorbed by the plastic.

If you want to make the color darker, you only need to extend the time the lens is immersed in the liquid.