Do high index lenses break easily?

material for some eye doctors within their own lenses. Glass lenses provide excellent optics, probably the most scratch resistant lens material and blocks UV light. However, glass lenses are heavy, thick and dangerous if broken and can’t be used in certain frame styles. Some glass can be acquired with a refractive index as high as 1.8 and 1.9. At GreenLake Eye Care you will end up impressed by the quality of the lenses filling those new frames. Whether you want cost-effective CR-39 plastic, shatter-resistant polycarbonate, or lightweight high-index lenses we have you covered. We are able to even add lens coatings to reduce glare, block UV, and prevent fogging.

• Developed in the 1970s and widely used until Trivex arrived.
• Because high index lenses are typically flatter than regular lenses, they have a tendency to reflect light more easily.
• The low the index, the more material is required to accurately refract light.
• Many occupations impose demanding visual requirements on those who wear eye glasses.

and includes 100% UV protection inherently. If the sphere on your own prescription is +/-3.00 or higher, you need to choose polycarbonate lenses. Polycarbonate lenses have become difficult lenses to tint and are not recommended for people who want custom dark sunglass lenses . The suggested prescription range for polycarbonate lenses is plano to +/-6.00 sphere.
Choose wisely through an established optician or eyewear retailer. Most high-index plastic lenses are aspheric to optimize both appearance and optical performance. With polycarbonate and CR-39 lenses, an aspheric design is optional and designed for an added cost. Lighter than high-index plastic lenses.Trivex1.5445Superior impact resistance. 1.67 high index lenses are significantly less costly in comparison to 1.74. Though both decrease the eye distortion caused by

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called CR-39, but also are available in a variety of hi-index lenses, which are thinner and lighter. While most people choose the newer plastic lenses, you may still find numerous people who continue steadily to prefer glass. Each material has its advantages and disadvantages, and the lens material you choose is really a personal choice.
All standard coatings, such as for example anti-glare coating, scratch-resistant coating, and tints could be put on these lenses. There is no one type of eyeglass lens that’s right for everyone. The eyeglass lens type and eyeglass lens material that is best for you depends on several factors, together with your vision correction needs and lifestyle. If you are choosing eyeglass lens materials, additionally, there are some features or enhancements that you might want to consider. Progressive lenses provide clear, continuous vision from distance to near correction with no visible lines like the eye’s natural function. The cosmetic benefit of as an invisible bifocal appeals to most wearers.

Most of the time the “reading” area is smaller, shaped like a sideways “D”, and within the low hemisphere of the lens. If you are concentrating on distant objects, you look through the top half of the lenses. To read a book, magazine, or newspaper, you look through the “reading” area. One thing that’s difficult about using bifocals is dealing with the line between the two vision areas. It is difficult to switch from one focusing capacity to another. It can make your eyes tired, and it can even result in a headache, sore neck and sore back. Glare from wet roads, light reflecting off other vehicles, and glare from your own windshield can be annoying and dangerous.

Other Factors Whenever Choosing Eyeglass Lens Materials

Eyeglass lens material doesn’t change the corrective power of your glasses. Rather, eyeglass lens types offer different cosmetic and lifestyle advantages to the wearer. PLASTIC CR-39 is the choice for the budget-conscious consumer. Despite the versatility of plastic lenses, they are NOT ideal for children because the material isn’t impact resistant and will crack and scar.

It blocks UV rays, is shatter resistant and is used in sports glasses and glasses for children and teenagers. Because polycarbonate is soft and can scratch easily, scratch resistant coating is typically applied to the lens. High-index refers to lenses having an index greater than 1.58.

in brightly lit areas, whether for indoor or outdoor settings. For sunglasses, a backside anti-reflective coating helps with reducing reflection. High index material is more susceptible to scratches, and should be handled with more care than regular lenses. We recommend adding a top-tier scratch anti-scratch coating to preserve the clarity of your high index eyewear.