The life of eyeglass lenses

The styles of lenses on the market are dazzling, with all kinds of colors, functions, and styles. However, when it comes to the life of eyeglass lenses, we have to start with the material. Different lens materials have different lifespans. 

Crystal lenses

Crystal lenses are usually made of natural crystal materials. This material has excellent optical properties, can effectively reduce the weight of the lenses, and make them more comfortable to wear. In addition, crystal lenses also have UV protection and scratch resistance. Although the material of crystal lenses is excellent, its light transmittance will gradually decrease with the increase of years of use. Generally, the light transmittance of a new lens is 98%, the light transmittance of the lens after one year is 93%, and the light transmittance after two years is 88%.

Glass lenses are wear-resistant and scratch-resistant. Generally speaking, if the lenses are not severely scratched or damaged during use and the degree does not change, they can be used for a long time. However, glass lenses are relatively heavy and fragile.

Resin lenses 

Resin lenses are a relatively common material on the market. Its service life is affected by many factors. First of all, the material properties of resin lenses determine that they are easier to scratch than glass lenses. Although resin lenses have been specially treated, it is still difficult to completely avoid scratches in daily use. Secondly, usage habits and maintenance methods are equally important. Frequent cleaning, incorrect wiping methods, and harsh usage environments may accelerate the wear and aging of lenses, so the service life of resin lenses are generally 1 to 2 years.

PC lenses

PC lenses are light in weight, have good light transmittance, are scratch-resistant, and are not easy to break. They can be used for several years to more than ten years, depending on the material quality, usage habits, and maintenance.

In short, no matter what material the lens is made of, we need to pay attention to daily maintenance and care to extend its service life.