As noted above, both polycarbonate and Trivex have similar impact resistance, which is also higher than other forms of plastic. Polycarbonate vs. Trivex (continued) Product Comparison (continued) Birefringence Birefringence is a result of strain or stress caused by force that is applied to a lens substrate material. All rights reserved. Dr. Richard Bensinger answered. The glasses I'm using currently are hi-index plastic and while it's ok, it doesn't feel, Q: Please help. Other specifications like protection from direct UV rays make polycarbonate ideal for use in lenses. There is also Trivex now, quickly becoming an industry darling. If have a pair of glasses made with high index plastic and … This feature is impacted by a higher refraction index and lower specific gravity. This website is created for a purpose, we want to help as many people as possible, to make an informed choice when shopping for glasses. Our A.B.O. Send thanks to the doctor. acetone) while polycarbonate eyeglass lens is not. Trivex traditionally costs more than double the price of polycarbonate. Both materials are lighter, thinner and more resistant, than plastic and glass of course, so suitable for activities requiring eye protection against impact: Trivex is better in terms of optical quality. They are both manufactured from different compounds and are available in a wide variety of designs and models. If you're going to be racing, hiking, or running, you don't want to feel the sunglasses on your face. If you want an AR coating on the Trivex lenses you have to pay for it. We hope to be helpful for you! Polycarbonate was first introduced to the optical world in the late ’70s as an ophthalmic lens. For the past many years, Roche Industry provides on-demand manufacturing services using processes like 3D printing, CNC machining, vacuum casting, injection molding, and much more. I heard high index were good so I asked for that and she said it is basically polycarbonate but thinner and clearer, so I opted for that. Eyeglass Tyler compares the pros and cons of two popular lens materials, Trivex and polycarbonate, to help you figure out which one is right for you. Trivex eyeglasses are more expensive as anything is new and better. Despite the difference, you may not be able to notice that Trivex is ten times thicker than polycarbonate. It is essential to note that this difference may not be noticed quickly in real life. Polycarbonate has a higher index of refraction than Trivex (1.58 vs. 1.53), so polycarbonate lenses are about 10 percent thinner than Trivex lenses. Value—The modest up-charge ECPs see on their wholesale price lists for finished, conventionally … Trivex is just as impact resistant as polycarbonate and may also be prescribed for children’s lenses, sport lenses and safety lenses. If any coating is added to either polycarbonate or Trivex, the differences become more manifest, especially in terms of impact resistance. It was developed in 2001 by PPG Industries as an alternative to polycarbonate. Got a new pair of glasses with bifocals and noticed that the left bifocal is slightly tilted and at a different height than the right. Both lenses have comparable impact resistance and offer 100% UVA/B protection. 0. Compared to the polycarbonate (refractive index of 1.58), Trivex has a slightly lower refractive index of 1.53. However, the prices of these lens materials differ significantly in the market. #1 Priority Should Be Optical Quality. On the other hand, Trivex has a higher Abbe value and lower chromatic aberration. That is because Trivex has a lower specific gravity compared to polycarbonate. 1. A higher Abbe value due to less chromatic aberration, Trivex offers sharper peripheral … Trivex also has a higher tensile strength. Trivex, when compared to polycarbonate, works better. Because of less internal stress, Trivex produces a clear central vision than polycarbonate. Materials with a … However, users are advised to conduct their homework well and put the material through their tests to determine if it is suitable for particular uses. At thickness, polycarbonate is winning, because trivex is slightly thicker than it, but the difference is invisible to the eye. Polycarbonate does not go without drawbacks. 1 doctor agrees. It is lighter than standard plastic lens material and features the highest impact resistance of any lens material, bar none. For any given prescription, Trivex is a lighter lens than its polycarbonate counterpart. The scratch-resistant coating also enhances the strength of both Trivex and polycarbonate. This article will down the facts about both Trivex and polycarbonate, put them to the test. It combines the positives of polycarbonate with higher optical quality, which makes it a step in the right direction for lens prescriptions. Trivex and polycarbonate both have similar impact resistance and UV protection. In other words, they are not rigid and stiff. © Roche Industry 2021. The one who wins is you. On the other hand, Trivex has a better optical superiority with an Abbe value of 45. Polycarbonate also has a high likelihood of cracking when drilled because it has a low tensile strength. Trivex is also much more resistant to chemicals than polycarbonate. Polycarbonate lenses are thinner and lightweight than other plastic or glass materials.
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