Trivex Material Properties

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Bausch and Lomb presented the initial factory-produced ophthalmic glass in the U.S. in 1916. CR-39, the “space age polymer”, was first used in ophthalmic lenses in 1962 In the early 1980s, polycarbonate was introduced by Gentex Corporation. High Index 1.60 was introduced in 1987, 1.66 in 1992 and 1.74 in 2005.

Developed For Lightweight Protection

Semi-rimless frames may also be an ideal choice for those who enjoy the extra comfort and minimalist feel. For anyone who is very active and frequently outdoors, Trivex may be a great choice for you. When you are more of a standard glasses wearer, you can probably simply use polycarbonate lenses. Trivex originated for military applications, so it is good for outdoor use. Other benefits include resistance to chemicals and better light refraction.

• Further distinguishing itself, Trivex is ideal for drill mounting, since it material properties in this respect are superior to polycarbonate.
• Trivex lenses are slightly lighter, have an increased tensile strength, and could produce sharper central vision and peripheral vision due to their higher Abbe value and lower internal stress.

In this case, Trivex material was engineered to be the lightest material (1.11g/cm3). In exactly the same Rxs, lenses with Trivex material are always thinner and lighter than CR-39 monomer because of its index, extreme impact resistance and specific gravity. That’s because thinness reduces lens volume and creates the final weight of the lens. However, the true lens weight is really a function of volume and the material’s specific gravity.

Pros Of Trivex Lenses

If the frame sits high, you should know where the PLR, sits within the frame. If your prescription is moderate to high, this measurement is increasingly more important. Since 2001, other chemical companies have been focusing on formulas for materials that mimic the wonderful characteristics of Trivex.

• These are conventional plastic material lenses with a refractive index of 1 1.498 which have been trusted since their introduction in 1947.
• Plastic lenses gained popularity in the 1970s and also have the advantages of weighing half just as much as glass lenses because of their lower specific gravity and having high optical quality.
• The ophthalmic lens market began to utilize it in the late 1970′s, thus polycarbonate ‘s been around essentially unchanged for quite a while.

Because of their superior tensile strength, Trivex lenses are less inclined to crack at this connecting point than lenses manufactured from polycarbonate or other lens materials. As the foundation of all eyewear, the lens material determines how well a lens will perform in real life situations. Which means the lenses you fit on your patients need to provide precisely what their eyes need at any given moment. Trivex material is really a unique, scientifically-advanced group of lens material developed to provide the best balance of all performance properties – clear, light, thin and strong.