Company description
According to introducing, the classification of the computer glasses basically see the lens, the types of market roughly divided into 4 kinds, namely the colored lenses, color lenses, polarized lenses and change color lenses.
Colored lenses, also known as "dyeing lens", is in the lens production process, add some chemicals, let the lens present color, to absorb certain wavelengths of light. This is the most commonly used sunglasses lens type.
Color lens, this lens effect and color lenses is the same, only is made in different ways, it is the color painted on the surface of the lens, the most well-known is "gradually layer type the color of the lens", the color is the deepest, and then gradually down. Is the general prescription sunglasses is more color way computer eyewear lenses.
Polarized lenses, in order to filter the sun shone on the water, land, or snow in the direction of equality of dazzling light, special coating on the lens in vertical, is called a polarized lens. The most suitable for outdoor sports activities (for example: the sea fishing, skiing or).
Color lenses, also some people called "photographic lenses. Because adding suitable amount of chemicals on the lens, let originally colorless lens, in bright light, strong ultraviolet irradiation, it becomes colored computer eyeglasses lenses, are mainly used for protection from ultraviolet light to the eyes burn, so it is suitable for indoor and outdoor use, especially in the high altitude ultraviolet region.
Teach you read product identification
A pair of sunglasses, with our current standards does not necessarily have additional protective properties such as uv or shock. Only when the products have clear performance, assessment on these indexes. Identification on uv resistant, ultraviolet ray is refers to between 200 nm to 380 nm wavelength of the sun's rays, including three categories: UVA wavelength of 315 nm to 380 nm, UVB rays wavelength of 280 nm to 315 nm, UVC wavelength of 200 nm to 280 nm. Reaching the earth's surface of the sun's light (290 nm to 2000 nm) in uv accounted for about 13%, and more than 97% UVA, UVB accounted for 3%, UVC close to zero.
The damage degree of ultraviolet radiation to the human eye mainly depends on the wavelength of ultraviolet, radiation intensity and time, the strength of the defense computer glasses mechanism, the human eye and cornea, lens uv damage are the most common eye tissues.
In order to protect the health of the eye, can choose sunglasses with uv protection functions, try to eliminate under 380 nm uv light. In general on the glasses UV400 or 100% UV is glasses with UV protection function.
Logo on safety performance, has the security protection performance of computer glasses, the lens using impact resistant materials, such as PC sheet for motorcyclists, drivers, etc have special requirements on the safety performance of consumers is a good choice.
People learn to protect themselves, when buying a product should be for the complete packaging, and save it well, these are the factory's commitment to product performance.
