Nowadays, when it comes to getting a pair of discountglasses, most of the time may be focused on optometry and frame selection: understandably, optometry takes time, as both subjective and objective optometry are necessary.

It seems acceptable to spend time on glass frames - it is important to choose ones that fit your face shape, are aesthetically pleasing, and look good when worn.

To enable nonindustry users to choose suitable lens products, the current eyeglass mart mainstream materials used for eyeglass lenses (mainly resin), and how to make the correct selection based on their own needs and applications.

The characteristics of CR39 are high Abbe number, high transparency, strong wear resistance, low density, good dyeing performance, solvent resistance, chemical resistance, and heat resistance. Moreover, due to mature production technology and low cost, it is still one of the mainstream materials in the lens industry until now.

Trivex is also a resin material used as a material for eyeglass lenses. The biggest characteristics of the material are its light weight and good impact resistance. So it is usually used to compare with PC lenses.

Trivex not only has the same impact resistance as PC chips but also has the advantages of chemical solvent resistance and scratch resistance. Moreover, the Abbe number is higher than that of PC.

What is the concept of the Abbe number? It can represent the anti-dispersion ability of materials, and the higher the Abbe number, the basic principle is that when sunlight is refracted, different colors of light have different refractive indices.

Trivex material has a lower refractive index, which is similar to the application range of CR39 in vision correction. However, due to its excellent impact resistance and low-density advantages, the lens is thinner and safer than CR39.