How can you tell the difference between polycarbonate and plastic lenses?

Polycarbonate is a thermoplastic that starts as a good material by means of small pellets. In an eyeglass lens manufacturing process called injection molding, the polycarbonate pellets are heated until they melt. The liquid polycarbonate is then rapidly injected into lens molds, compressed under ruthless, and cooled to create a finished lens product in a matter of minutes.

This means that polycarbonate lenses may be used in different forms of frames which are inaccessible to plastic lenses. Anytime you are searching for a new couple of eyeglasses, you will definitely be provided with different alternatives regarding the lens material.
They are available most commonly in grey or brown tint but many other colors are available. This reduces the amount a lens may bulge out of an eyeglass frame, reducing the magnification of the eyes, which improves cosmetic appearance. The abbe value may be the amount of chromatic aberrations in a lens. The bigger this number is, the better the quality of vision through the lens will undoubtedly be. Law enforcement officers and military personnel can also benefit from the impact resistance of polycarbonate. A lens with a minimal abbe value causes an increased dispersion and results in unwanted visual distortion.

How Much Thinner Are Polycarbonate Lenses Than Plastic?

having these really thick, heavy lenses or these thin and light lenses. Polycarbonate lenses are always recommended for children because of their impact-resistant properties. This lens type can be suggested if you will undoubtedly be making use of your glasses for sporting activities. Plastic lenses have the highest abbe value of any plastic lens. Therefore, they have a minimal amount of visual distortion and high optical clarity. Plastic lenses don’t have inbuilt protection against harmful ultraviolet rays, unlike polycarbonate lenses that have inherent UV protection.

• Over the centuries, glass became more affordable and accessible, thanks to huge improvements in understanding optics, refractive measurements, and glass manufacturing processes.
• Your best bet will undoubtedly be reaching out to your local optical store or one of our friendly opticians.
• CR-39 is the most commonly used material nowadays, polycarbonate may be the second.
• Being an industry-standard, polycarbonate lenses are affordable and inherently UV-protected.
• selection of contacts, glasses, & sunglasses.
• For example, this kind of lens is often utilized by fishermen who work in bright light that’s being reflected off the water.

The impact resistance makes polycarbonate lenses perfect for physical activity, and the lightweight makes them comfortable to wear for long stretches without feeling worn off. That’s not it; what impresses me the most is that polycarbonate can inherently protect the wearer against Ultra violet rays without the additional coating.

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The refractive indexis a measurement of how light bends by way of a medium. The higher a lens can score on the refractive index, the thinner a lens could be while still maintaining an accurate prescription for an individual. The refractive index can reveal how accurate and powerful a lens can be.
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Aspheric lenses are also much much lighter than standard spherical lenses. Hi-index lenses can correct vision with less material, making the lens much thinner.

• than others lens except weight.
• You can then apply the information you
• Polycarbonate lenses are treated with a particular hard coating that produce them more resistant to scratches and impact.
• These make plastic lenses ideal for active lifestyles and children.
• However, glass should be specially treated for impact resistance.

If your prescription isn’t quite as extreme , polycarbonate is a superb choice. It’s lightweight, strong and the lenses generally cost a lower amount. Generally of thumb, in case you have a strong prescription, high-index is the strategy to use.

In the event that you choose CR-39 lenses you commonly find that UV-protection comes at an added cost because, unlike polycarbonate, they aren’t inherently UV-protected. Various high index lenses are available today in different price points predicated on how much thinner they are compared to regular plastic lenses. The lenses are classified by their “index of refraction” (or “refractive index”). Polycarbonate ranks lowest predicated on a measure of chromatic aberration called “Abbe value,” which indicates how much light a specific material disperses. High-index lenses measure slightly better than polycarbonate.