1.60 Lens Material

At Eyeglasses.com, we only use labs that employ a large staff of highly trained technicians, doing a large level of lenses every day. We do none our very own edging services ourselves – all of it is done by our lens laboratories. The majority of our orders require stock lenses; our custom surfacing work is performed by lens laboratories. The laboratories that we use each have many years of experience and do thousands of lenses each week.

• They are particularly useful for imaging applications because they minimize chromatic aberrations.
• Five different groups are involved in the making of prescription lens.
• Additionally, polycarbonate is the most easily scratched plastic, thus requiring a scratch-resistant coating.
• Photochromic lenses can be found in nearly all lens materials and designs.

Glass comes in very high indices such as 1.8 and 1.9 but due to the density it really is still very heavy. High index plastic lenses can be utilized in desired rimless and 3 piece mount frames.

Chromatic Dispersion Correction

This implies high-index lenses bend light at steeper angles than standard-index, hard resin lenses. Therefore, high-index lenses need less curvature to achieve the same focal power. That’s why a lens made from a 1.67-index material could be significantly thinner when compared to a standard-index (1.50) plastic material with the same prescription. Due to ever-expanding range of high-index lenses available, many dispensers are unsure of how choose an appropriate lens for a patient. With so many lens materials and lens treatment combinations available, knowing when to recommend one high-index lens versus another can look like a numbers game. To win that numbers game, you’ve surely got to master a few key optical concepts and facts.
CR-39 lenses have a high Abbe value of 59.3 making them the lenses with the least distortion from dispersion/chromatic aberration. The refractive index of a simple plastic lens (CR-39) is 1.498 and therefore light travels 1.498 times faster in vacuum pressure than it does through the plastic lens. Eyeglass lenses tend to be categorized by their refractive index . Single vision lenses for pixel-perfect precision and outstanding visual performance.

Using a high-index lens material—one with an index of refraction which range from 1.60 to 1 1.74—can reduce lens thickness and weight, making eyeglasses comfortable and cosmetically appealing. High-index lenses can also be used to improve the fit of lenses in the frame. Polycarbonate lenses are less likely to fracture than plastic lenses or hi-index, so that they are a great option kids’ glasses. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses. Anti-reflective treatments—such as Crizal Sapphire® 360°—can be added to Essilor’s polycarbonate lenses. Zeiss from all over the world are offered at the web optical superstore.

Definition Of The Abbe Dispersion Valuechromatic Aberration ©

Dark sunglass tints, light fashion tints, and gradient tints can be purchased in all colors of the rainbow. CrystalView No-Glare anti-reflective coating that reduces glare and can help you see better. Johnson & Johnson originally developed the Definity lens technology, and then sold it to Varilux. It is a great high index lens for all those having an active life – golfing, biking, hiking and tennis and moderate corrections.
1.59 index lenses are incredibly resilient, offer UV protection, and so are impact resistant. These lenses are produced from a unique polycarbonate material and may be tailored to the individual.

As a result, you obtain the most comfortable and easy to wear progressive lens that’s available available today. The Definity lens is related to the Physio Enhanced lens, so it is even more comfortable to wear compared to the Physio or the Comfort Lens. The available range for this lens is -9.00 to +6.00 sphere and -4.00 to +3.00 cylinder . LensFactory will not take returns in line with the weight of the material used to generate the lens. If you want to look other materials which will be a lighter weight, please navigate with the header above. And high Abbe number give the lens optical properties comparable to those of glass lenses.

Zeiss Zeiss® Smartlife 3d Hi

All lightweight eyeglass lens materials have surfaces which are significantly softer and much more prone to scratches and abrasions than glass lenses. Plastic, polycarbonate, Trivex and high-index plastic lenses all need a factory-applied anti-scratch coating for adequate lens durability. Are thinner and lighter in comparison with standard plastic lenses and reduce lens thickness. Because the index of the material rises, the Abbe value goes down that may affect the lens optical performance.