Are polycarbonate and high index lenses the same?

Polycarbonate lenses are ideal for those people who are doing sports while wearing glasses. It is also found in children’s glasses since kids are significantly less careful making use of their glasses than adults. With a thicker lens, these kind of frames could be less attractive and in addition more difficult to wear, as thicker lenses are not as secure within the frame and are more likely to pop out. Due to these properties, it’s the lens material of choice for children’s lenses, sports lenses, and safety lenses. Hi-index lenses can correct vision with less material, making the lens much thinner. When you are considering your eyeglass prescription, a plus (+) register the “sphere” section indicates a farsighted correction, while a minus (-) sign indicates a nearsighted correction.

This material allows for a thinner lens, especially in extra-strong prescriptions. Polycarbonate lenses were introduced sometime in the 1980s by the Gentex Corporation. This new eyeglass lens material had a high index of refraction, making it to be the lightest and thinnest lens material available then. Complicated mathematical formulas are employed with the optical prescription to determine the exact thickness of a lens in a specific frame for a particular patient. “High index” implies that the lenses are made of a plastic or glass material that has a higher index of refraction.
Your plain English library for vision therapy, children’s vision, neuro-optometry, and primary eye care. High-index lenses can improve lens comfort and appearance, and can even open the entranceway to a larger variety of frames. High-index lenses may be just the answer you have been searching for. High-index lenses contain a unique aspheric design which facilitates a flatter lens curvature, leading to reduced magnification and improved appearance. High-index lenses have a refractive index above 1.50— ranging from 1.53 to 1.74. A high-index lens may be recommended if your optical prescription is above 2.00 diopters. Schedule an appointment with an eye doctor to discover if high-index lenses certainly are a good fit.

Thinner

isn’t quite as extreme , polycarbonate is a great choice. The frames you select are what everyone will notice, but of course the lenses have the effect of correcting your vision. The lens index is a numerical representation of the refractive capabilities of a lens’s material.

• Various high index lenses are available today in various price points predicated on how much thinner they are compared with regular plastic lenses.
• Actually, most protective eye gear and sports goggles are made from polycarbonate lenses, even when no vision prescription is necessary.
• Just like high index lenses, aspheric lenses are also thinner than regular lenses.
• In case you have a high

Eyeglass lenses are often categorized by their refractive index . To make high index lenses even more attractive, many of them have an “aspheric” design.
Lenses with a minimal Abbe value can have problems like colored halos, while an increased Abbe value means better optical quality. High index lenses with 1.74 high index will be the thinnest lenses in the marketplace, and are made only for people with the best prescriptions. If your prescription is leaner than +/-6.00 sphere, there is no need for you to spend the excess money for an ultra high index lens. Previous to the previous few years, the only materials designed for use as lenses were glass and a difficult resin called CR-39. High index materials are named since they have a higher index of light refraction.

59 Polycarbonate

They have been a popular choice for both adults and children with glasses going back 50 years and the formula has only improved since that time. High index lenses aren’t the best option if you want to tint your lenses to a dark shade. High index lens density doesn’t allow to be tinted to more than anything more than a light shadow. Alternatively, polycarbonate lenses omes with a coating that allows them to tint a lot more compared to the high index. You need to choose high index lenses as they’re lighter, thinner, comfortable, and attractive.

Therefore, Hi-Index lenses offer a superior visual experience and ultimately the very best looking pair of glasses. If your prescription is +2.00 to -3.50, plastic CR-39 or polycarbonate lenses will continue to work just fine. However, if you prefer a slightly thinner lens, polycarbonate would be the best option.

They are available mostly in grey or brown tint but many other colors are available. The anti-reflective coating decreases unwanted glare and halos at nighttime. It also makes the lenses appear somewhat invisible and incredibly thin. The bigger this number is, the higher the grade of vision through the lens will undoubtedly be. For instance, some offer protection from the glare of computer screens. Others thin out lenses that would otherwise be thick and stand out of a frame. High-index lenses are more expensive to manufacture and much more difficult to grind, making them more expensive than other types such as polycarbonate.
Combine three innovative technologies for our best in vision, clarity, and protection. At PlasticRanger, we enlighten our readers with the happenings in the world of plastics. Oliver is an ABO Certified Optician and contains been working in the eye care industry for over 15 years. His books, videos and articles touch on various subjects, such as for example eye care, good tech habits, motivation and leadership.
Lighter and thinner high index lenses are strongly suggested for you should you have a prescription for farsightedness or astigmatism and nearsightedness. If your prescription