Uv cut意思

"UV cut" is a term used in the context of sunglasses and eyewear. It refers to the ability of the lenses to block ultraviolet (UV) radiation from the sun. UV radiation is a type of light that is known to be harmful to the eyes and can cause various eye diseases and premature aging of the eye tissues.

When a pair of sunglasses is advertised as "UV cut," it means that the lenses are designed to absorb or reflect a significant portion of UV radiation, thereby reducing the amount of UV light that reaches the eyes. The most common types of UV radiation are UV-A and UV-B rays, and in some cases, UV-C rays as well.

The level of UV protection is often indicated by a number or a rating. For example, a rating of "UV400" means that the lenses block 100% of UV rays with wavelengths of up to 400 nanometers, which is the standard for full UV protection. It's important to choose sunglasses that provide adequate UV protection to safeguard your eyes from the sun's harmful rays.