Polycarbonate is used in 35% of all prescription glasses. High index lenses have a refractive index (ability to bend light) of 1.60 or higher. Essilor’s polycarbonate lenses are 20% thinner, 30% lighter, and 12x more impact resistant than standard plastic lenses.
Ultra HighIndex 1.74 Progressive Lenses (No Line Bifocals)
You're in the process of becoming an eye care professional and your first instinct was to order prescription eyewear online?
Affordability was not an issue, there was only a $10 difference between the 1.59 polycarbonate and 1.61 high index.
Do i need high index lenses? Polycarbonate lenses are an ideal option for children’s eyewear since they are tough, lightweight, tough, and durable. But then you'd know if polcarbonate works for you. As well as looking good, thin lenses reduce the total weight of your eyeglasses, making them more comfortable to wear for long periods of time.
Crown glass abbe value = 59;
So, from the above information, you can know the differences between polycarbonate and high index lenses. Polycarbonate lenses are an ideal option for children’s eyewear since they are tough, lightweight, tough, and durable. Because of their durability, polycarbonate lenses are much less likely to break or fracture than even high index lenses. But if you consider the lifetime cost of new polycarbonate lenses versus high index (say, $100 difference, new glasses every 4 years, live for another 40 years = $1000), it's not that much more money for high index (depending your your parameters for that equation).
This new eyeglass lens material had a high index of refraction, making it to be the lightest and thinnest lens material available then.
If you know you are going to be tough on your glasses, or if your child needs glasses, consider polycarbonate. Up to 3% cash back do i need high index lenses? Aspheric lenses can be made in many lens materials. Polycarbonate lenses rose to critical acclaim due to its durable, and additional properties.
Because of their durability, polycarbonate lenses are much less likely to break or fracture than even high index lenses.
If you have a high eyeglasses prescription, high index lenses are recommended to ensure that your lenses are as thin as possible. Polycarbonate and plastic lenses differ from each other in many factors such as affordability, tint resistance, uv protection, impact resistance, lightweight, and optical clarity. Our 1.6, 1.67, and 1.74 index lenses can all be considered high index. Both the options have their pros and cons.
Polycarbonate lenses have an index of refraction of 1.59, and will generally be about 20% thinner than standard plastic lenses.
We offer a few different indexes on our lenses. So, high index lenses are good choices because they are slimmer and lightweight. Since polycarbonate is 1.58 index, it is considered a “mid index” lens. Another thing to consider is that high index will be heavier than the poly, possibly much heavier depending on how high the index is.
This is your best option if you cannot adapt to polycarbonate due to distortion issues and require a.
Polycarbonate lenses also provide you with protection from 100% of the harmful uv rays from the sun. When others look at you with your glasses on, they tend to notice the frame, but the. Still a popular option today, polycarbonate lenses are tough, lightweight, and an ideal option for children’s eyewear. Should you worry about abbe value?
Individuals with a relatively strong prescription may find high.
Most people can’t perceive the color distortion at these levels. Polycarbonate lenses were introduced sometime in the 1980s by the gentex corporation. Polycarbonate abbe value = 30; Polycarbonate lens material is best for impact resistance and cost reduction, as the material is affordable and extremely impact resistant.
High index lens material is best for getting thin, lightweight lenses that reduce eye distortion and allow for an attractively thin profile to the lenses.
It’s entirely upto your decision about what fits you the best. Our polycarbonate lenses have a 1.59 index which, while quite thin, is more focused on durability than lightness. Standard plastic lenses are around 1.48, so polycarbonate is a good, inexpensive alternative to standard plastic lenses if you do not have a very high prescription.
