Trivex and High Index, what are they? As a relatively niche choice, these two new lens materials are the preferred choice for many individuals pursuing uniqueness and fashion.

But many people do not understand the less common terms Trivex and high index. In this blog, everything you want to know about these two lenses will be introduced.

What are Trivex glasses?

Trivex is a resin material developed by PPG in 2001. Initially developed for military use, later used for eyewear lenses. Trivex was originally used for NXT lenses, mainly for sports glasses such as cycling and skiing goggles, with its most prominent feature being impact resistance.

Trivex is often compared to PC (polycarbonate) lenses. Although Trivex has similar impact resistance to PC lenses, it also has advantages in chemical resistance and scratch resistance. Moreover, the Abbe value of Trivex is higher than that of PC, approximately 43-45. It is significantly superior to other lenses in managing light diffusion. A lower Abbe value may indicate more color difference and distortion in the lens.

What is the Abbe value? It represents the ability of materials to resist color differences. The higher the Abbe value, the smaller the color difference under the same conditions. The basic principle is that when sunlight is refracted, different colors of light have different refractive indices, resulting in dispersion.

What is a high refractive index lens?

Before understanding this, we need to first understand what refractive index is. Remove the glasses, and the numbers 1.49, 1.56, 1.60, 1.67, 1.71, and 1.74 marked on the lenses indicate the refractive index of the lenses. For myopia correction, under the same other parameters, the higher the refractive index of the lens, the lower, thinner, and lighter the edge of the lens.

High refractive index lenses use materials with high density and strong light refractive ability. Compared to ordinary lenses, they can more effectively bend light, making the lenses thinner, lighter, and flatter.

Most high refractive index lenses are typically made of various types of plastics. In the past, glass lenses were commonly used, but they had limitations in achieving very high refractive indices without becoming too thick or heavy. With the advancement of optical technology and material science, manufacturers are able to develop specialty plastics with a higher refractive index than traditional glass (cheap eyeglasses near me). Compared to traditional glass lenses, plastic can achieve a higher refractive index.