PPG’s lens material Trivex has found a niche due to its unique properties of clarity, strength, and light weight.
Introduced in 2001 by PPG Industries, Inc., Trivex‘ lens material has become a staple in the lens material arsenal of ECPs. At its introduction, Trivex was considered a potential replacement for the company’s widely successful CR-39‘ lens material, which it patented in 1946. The big surprise is that Trivex found its own niche, due to its unique properties.
Trivex lens material has three main features: clarity, strength, and light weight. The clarity comes from the material’s chemical composition and from its optics. Trivex is created from the combination of two elements using special machinery. The manufacturing process must be done precisely to create Trivex lenses. Clarity is also obtained through the material’s Abbe value, which varies from 43-45 depending on which company casts it. Trivex is also highly impact resistant. In fact, it meets the Z87.1 safety eyewear impact tests so you know it’s tough. With a specific gravity of 1.11 g/cm3, Trivex is the lightest lens material commonly utilized by ECPs.
Trivex has become popular for a number of reasons. It has found a huge market in rimless eyewear because it drills well and doesn’t have the problems polycarbonate has with drill holes chipping and cracking during drilling and after weeks or months of wear. It’s 1.53 mid- index of refraction makes it lighter and thinner and it’s well suited for the huge number of patients whose prescriptions fall between +/-3.00D (85% of eyeglass wearers). You’ll also find it available in just about any lens style you can imagine.
Today, Trivex has found its way into the lens material arsenal of most ECPs and is being used in all kinds of eyewear. It’s ideal for children’s eyewear and sports eyewear, and any lifestyle requiring clarity, strength, and comfort.
In children’s eyewear, parents want what’s best for their little ones. The material’s super impact resistance, light weight, and clarity along with its lens-slenderizing property combine to give children just what they need in prescription lenses. The material is so versatile that it is even being used to make eyeglass frames due to its strength and lightness. NXT‘ sun lenses are made with Trivex lens material too.
Ed De Gennaro is Director, Professional Content of First Vision Media Group. Carol Gilhawley is Senior Editor of VCPN.
|WHERE TO FIND IT:|
|Carl Zeiss Vision Inc.
|Essilor of America, Inc.
|HOYA Vision Care, North America
|Nassau Vision Group
|PPG Industries, Inc.
|Seiko Optical Products of America, Inc.
|Shamir Insight, Inc.
|Shore Lens Company
|Signet Armorlite, Inc.
|Thai Optical Group
|Transitions Optical, Inc.
|X-Cel Optical Co.