What is the difference between CR 39 and polycarbonate lenses?

It really is least noticeable when looking directly through the central optical zone of the lenses. They are often added to sunglass lenses to boost contrast and quality of vision. Polarized sunglasses are great for people who spend plenty of time outdoors or have become sensitive to light. Polycarbonate lenses have higher impact resistance and offer greater protection than plastic lenses. CR-39 maintains its material properties like a consistently clear state, lens stability and has the highest scratch resistance of any uncoated optical plastic.

Polycarbonate lenses have outstanding impact-resistant properties, this means they don’t shatter into tiny pieces making them safe and a choice for the wearer. It provides increased protection to the wearer from eye damage or injury because of shattered eyeglass pieces. That feature makes polycarbonate lenses fabulous for those who constantly engage in activities or do high-risk, labor-intensive jobs. Lens materials vary in flexibility, durability, weight, thickness, scratch resistance, etc. The most popular and preferred options for lens material are polycarbonate and other plastic lenses.

Lens Materials

Most lenses in glasses today are created from CR-39 plastic, or very close copies . Our job would be to highlight the various benefits, drawbacks, and differences between both lenses. Because the introduction and use of Plastic lenses (generally known as CR-39), it has sealed its mark as the most preferred choice in the optical industry. No matter what sort of lenses you select, there
Your eyesight tends to worsen, with high prescriptions. Really the only advantage is it’s scratch-resistance and durability. Whatever doesn’t cause the glass to break usually leaves the glass itself relatively clear and unscathed. It’s when something happens to break the glass that serious problems arise… EASILY sell CR-39 it is only FF, my lenses are UV protected and I sell about 85% AR.

• Trivex is similar to polycarbonate in that it is also incredibly impact-resistant.
• Bifocals are ideal for those people who are presbyopic and need reading correction.
• Anything that tends to cloud plastic can cloud CR-39 lenses as time passes as well.

But if you’re buying your child’s first pair of eyeglasses with polycarbonate lenses for mild myopia, the price will be lower. These is going to be nearer to $200 (including a scratch-resistant warranty). Here are popular eyeglass lens materials, arranged in order of refractive index and lens thickness .

Lens Material

That’s all I want to say about Polycarbonate vs plastic lenses. Having a delayed one-on-one conversation together with your optician will solve a lot of questions in mind. It’s entirely upto your choice in what fits you the very best. It might take even more research and looking to find the best glasses online and offline options.
Many people enjoy using high-index lenses because they look better cosmetically and feel more comfortable. The first generation of plastic lenses made for glasses were called Columbia Resin #39 or more often called “CR-39”. This first usage of this plastic was to greatly help create fuel tanks for the B-17 bomber aircraft in World War II. The reduced weight helped raise the range of the bombers. Following war, the material was adapted to be used in eyeglasses lenses in 1947. The CR-39 was made to be an alternative solution to the heavy glass lenses. Lighter than polycarbonates, built with 100% UV protection without needing a particular coating, sufficient reason for incredible durability,Trivexis what we really enjoy recommending to patients. They have great optics, are heat resistant, and keep maintaining their dimensional stability (meaning they won’t become cloudy or warp as time passes).

Trivex is comparable to polycarbonate in that it is also incredibly impact-resistant. Other benefits of Trivex include fewer chromatic aberrations than polycarbonate, and it is the lightest lens material. Buying price of CR39 including ALL coatings is $0.83 a piece. Thats for all powers between +6 and -6 cilinder max 2.

Trivex Vs Polycarbonate Lenses

Most high-index lenses are aspheric in design, which means the lens is flatter. However, most everything that happens during an optometrist visit, is SALES. Sure they call it “prescriptions” – but that’s just to hide the point that it’s a commodity, they need one to buy it, that’s how they make their money.