cr39 vs polycarbonate reddit

Trivex Lenses vs polycarbonate lenses. The following holds true for both materials: Choosing the most suitable one hinges on individual factors such as visual acuity and personal taste. For people that love the Zeiss brand Read More The Zeiss CR39 lens is a good choice for corrections up to +/-3.00. Optimization Opportunities Optimization Opportunities. Traffic to Competitors . Trivex vs. Polycarbonate: A Quick Side-By-Side Comparison Thickness: 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, but as you see in the video, the difference may not even be noticeable. -Uncoated CR39 is the most porous of lens materials, making it easier to get a darker tint than other materials.-Hard coated CR39 is still easier to tint than polycarbonate since the hard coat does not need to be as dense. Polycarbonate: A variety of benefits that make it the most versatile of today’s lens materials. 14 Avg. The refractive index 1.59 is "pure" polycarbonate material, while the 1.57 is a "composite" of polycarbonate and typical plastic. Trivex is an improvement over Polycarbonate. Standard or 'regular' lenses are made from a plastic known as CR39 and have a 1.5 index. But if you choose CR-39 plastic lenses, be aware that these lenses need an added coating applied to provide … A wide-range of lens colors can be achieved with plastic CR-39 lenses. The AR coating layer is made with SIO2 (which is glass) and applied with a vaporization process. Posted at 06:14h in Uncategorized by 0 Comments 21 Organic Competition. A Vision Blog by LensDirect.com. Polycarbonate is a common lens material that is notorious for high chromatic aberration, and at -7 diopters, your prescription is strong enough that you’d notice. Tribrid is newish (2013) and targeted for stronger prescriptions in the +/-3.00 to +/-7.00 diopters range. Thankfully, polycarbonate and nearly all high-index plastic lenses have 100 percent UV protection built-in, due to absorptive characteristics of the lens material. 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. Both materials are an outstanding choice when it comes to prescription and non-prescription safety glasses. However, Trivex lenses have a much higher abbe value (43-45) vs. polycarbonate (abbe value 30) making it much better in optical clarity with fewer chromatic aberrations. Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so they are a great option kids’ glasses. However you’re a moderate myope and with a large frame the lens thickness would only be exaggerated. Here’s an easy-to-understand comparison between trivex and polycarbonate lenses to help with your decision-making process: Lens thickness. Trivex also blocks 100% of UV radiation. Trivex is a relatively new optical lens material. They’re more affordable than Trivex and are only moderately heavier. uvex catalogue. They can be made with CR-39, polycarbonate, or high-index lenses. 16 Avg. When it comes to contact lenses, sometimes you just can’t find the information you’re looking for. They can sharpen your sight even further if you apply an anti-glare coati… They are usually between 0% and 5% transmission of these rays. Trivex: Shady Rays offers 4-6 business day shipping for free. Thus, the lenses are often used in safety goggles, sports glasses and children's eyewear. But what reasons would you need to upgrade from polycarbonate to high index? Zeiss eyeglass lenses are made by Zeiss, the worldwide leader in optical lenses excellence. Thank you for the detailed response! Trivex vs. Polycarbonate. The higher the number, the thinner and lighter the lens. According to that, Optima offers the highest index refractory material (at 1.74) of the major manufacturers, but for safety, you may still want to think about polycarbonate lenses. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. While they won’t work if you require glasses to see both near and far, polycarbonate lenses will suit most people’s needs, and they are suitable for an AR coating. Most people have questions about this kind of stuff, and it’s often hard to figure out where to start. CR-39 Plastic lenses: Initially produced as a lightweight alternative to heavy glass lenses and are now the smart choice for moderate prescriptions. Start free trial for all Keywords. Plastic vs. Polycarbonate Lenses Today we are going to be talking specifically about plastic vs polycarbonate lenses and what the major difference is between the lens materials. It's a little heavier (1.23 vs 1.11) than Trivex and slightly worse Abbe (41 vs 44) but has refractive index of 1.60 vs … The 411 on Lenses. If your old lenses were smaller in general, the chromatic aberration would be less noticeable. Polycarbonate lenses can not be repaired, when purchased with an Anti Reflex coating. The lower numbers are classified as mid-index lenses. Either has advantages and disadvantages. Here is a brief comparison of polycarbonate and Trivex lenses to help you decide which lenses might be best for you: Thickness. Choose glasses that are sturdy, attractive, shatter-resistant, comfortable – and easy to wear. Mid-index lenses, such as 1.54, 1.56, and 1.57, are thinner than glass, and nearly as strong as CR-39. Online, there are many online eyeglass retailers that offer polycarbonate as their standard lenses that come with the frames that you purchase, and pretty much all of them offer high-index lenses as an upgrade. Acrylic is also less expensive than polycarbonate and unlike polycarbonate, acrylics can be heated and molded to shape, then heated again while retaining its quality appearance. 18 Organic Competition. Optimizing for buyer keywords. The stronger your prescription is, the higher the lens index available to you. Polycarbonate lenses are 10 times more impact-resistant than ordinary plastic lenses. Polycarbonate vs. High Index Lenses. polycarbonate vs cr39. One is slightly thinner and lighter than the other, but as noted the difference is very small, too small to guide a decision. 19 Jan. polycarbonate lenses vs high index. Traffic to Competitors . While relatively the same thickness as polycarbonate (depending on the prescription), trivex is about 10% lighter than polycarbonate lenses. This excellent Google answer regarding high index plastic lenses from March '06 provides many links that discuss various manufacturers offerings. This is due to CR39’s being naturally less prone to scratching than Poly. How thick will my lenses be? Advantages: Superior impact-resistance. Often, optometrists recommend polycarbonate lenses when safety is an issue. In terms of thinness, this lens index is thinner than 1.50 lenses. In fact it is a lens without weakness! This is the type in which all inclusive frames are made with. Trivex lenses ($200 for single vision, $400 for progressives) are more scratch-resistant than either CR-39 or polycarbonate … High-index plastic lenses have a refractive index between 1.6 and 1.74; the index of ordinary plastic and polycarbonate lenses is 1.5 and 1.59, respectively. Founded as a workshop for precision mechanics and optics in the German city of Jena in 1846, the Carl Zeiss Group of today is a global leader in the optical and optoelectronic industries. Polycarbonate lenses ($9 to $205): Slightly higher quality than CR-39 lenses, polycarbonate lenses are more durable, thinner, lighter, and the most popular of all lens options. If you need to get your sunglasses faster, they offer a $7 option for 2-4 business day shipping. Polycarbonate vs. Trivex Lenses: A Quick Comparison. Polycarbonate 1.59 lenses also feature great impact resistance and work best if your prescription is +3.00/-4.75 or above. (This image shows the difference in thickness of a standard 1.5 index lens & a 1.74 index lens - typically 50% thinner) You can select the thickness of your lenses at EyeBuyDirect by choosing a lens index. Weight. Plastic or glass lenses? Polycarbonate vs. Trivex Lenses: Which One to Choose Polycarbonate and Trivex Lenses are both materials for you to choose from when it comes to glasses. It is the best material for mild to moderate prescriptions. Polycarbonate lenses are naturally 100% UV blocking and extra durable. However, if your prescription exceeds -/+6.00, you should consider a high index 1.67 lens in order to minimize lens weight and thickness. It has the ultraviolet blocking properties (380 nanometers and less) and shatter resistant properties of polycarbonate. Anyone who wears glasses knows the difficulty of certain activities is increased because you must keep your glasses on your face while active. Below you will find a breakdown of each material so next time … It is a unique material that combines the advantages of CR39, Mid-Index lenses and polycarbonate, but leaves out all their inherent weaknesses. Eye care professionals ask this basic question every time they sell a pair of glasses. It is lighter and more scratch resistant and has high-impact resistance like Polycarbonate. The Varilux Physio CR39 polycarbonate lens is available in this range: -8.00 to +6.00 sphere, -3.00 to +3.00 cylinder, and up to +3.00 add. 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