Why are polycarbonate lenses better?

A higher index of refraction does mean denser material and therefore thinner lenses. Polycarbonate lens didn’t truly gain traction among the optical industry until recently due to various problems with the material clarity and manufacturing. But today polycarbonate lenses are gaining more control of the optical market and is really a very popular choice of lenses. An aspheric lens design gives several benefits to eyeglass lenses.

• If the optics aren’t as clear as glass, it’s polycarbonate.
• While plastic lenses are usually cheaper, polycarbonate lens may save over time since you can expect less replacement costs.
• For instance, some offer protection from the glare of computer screens.
• Try to edge yourself; if it has strips attached to the edge, it’s polycarbonate.
• And, unlike some other

Its density makes it easy to crack or shatter, so it is much less compatible with frame features like rimless or semi-rimless and not appropriate for drill mount designs. In the event that you choose CR-39 lenses you commonly discover that UV-protection comes at an extra cost because, unlike polycarbonate, they aren’t inherently UV-protected.

What Exactly Are Polycarbonate Lenses?

In comparison with other lens materials, high-index nor polycarbonate are recognized to supply the ultimate in optical clarity. The true winners are materials such as for example Trivex, CR-39 and Crown Glass. The cost and quality of polycarbonate lenses will vary depending on your prescription and the seller, so it’s worth shopping around. With your prescription, you have the right to shop wherever you like — from an optician, to get, or online. Glasses with polycarbonate lenses were first developed in the 1980s, and they’ve been improving since. All standard coatings, such as for example anti-glare coating, scratch-resistant coating,

• After an eye exam, doctors or retailers can find a unique solution for their clients based on their lifestyle and concerns.
• This lens type is also suggested if you will undoubtedly be using your glasses for sporting activities.
• Give some thought to the specifics of your own application to determine if one of these safety lens materials has a slight edge on the other.
• If your prescription isn’t quite as extreme , polycarbonate is a superb choice.

Polycarbonate lenses also have built-in ultraviolet protection. For example, some offer protection from the glare of computer screens.

Plastic Lenses On Your Own Prescription Glasses

Shatter proof, thinner, lighter material and just feels better on your own face because you have less weight there. Polycarbonate lenses are soft and flexible, that is what makes them incredibly impact-resistant. Surfacing Problems – It took time for manufacturers to develop new surfacing equipment that could surface polycarbonate lenses. Photochromatic lenses are great for people who do not wish to carry another couple of prescription sunglasses. Trivex is a more rigid material, rendering it a better selection for rimless or drill mount frames, and is simply as impact resistant as polycarbonate.
Today’s modern scratch-resistant coatings can make the surface of polycarbonate and Trivex lenses nearly as hard as glass. The cost of polycarbonate and Trivex lenses may differ considerably, but many optical stores charge more for Trivex lenses than polycarbonate lenses. Polycarbonate is really a thermoplastic that starts as a good material by means of small pellets. Within an eyeglass lens manufacturing process called injection molding, the polycarbonate pellets are heated until they melt.

Sometimes, you can save money in the event that you buy new eyeglass lenses only online instead of from your eye doctor. However, you’ll need your eyeglasses prescription to make sure you get the correct lenses. Polycarbonate lenses will vary from glass or plastic lenses because they’re thinner, lighter, and 10 times more impact-resistant. They offer extra safety for your eyes without sacrificing comfort or fit.
Abbe value is a measure of the lens material’s dispersion of light. A lens with a minimal Abbe value causes an increased dispersion and results in unwanted chromatic aberration.

Eye Care And Eyewear Tips

An instrument called a hand stone can help determine the difference because CR-39 will turn to dust, while polycarbonate produces a ‘swarf’, the word for a good buildup that’s created. Eventually, these obstacles were overcome and the polycarbonate material got developed to the polycarbonate material we realize today, because of the CD and entertainment industries. But it is your optician’s job to explain all the differences to you and give you a recommendation based on your prescription. EyeBuyDirect has a wide variety of budget frames starting at $6.