Difference in Lens Materials
CR-39 Plastic. Suitable for low power basic prescriptions. Clear vision at an affordable price point.
Not suitable for rimless or semi-rimless frames.
Polycarbonate. 25% thinner than CR39 lenses. Impact-resistant and is a good choice if you play sports, work where your eyeglass lenses could easily get damaged. They also have built-in UV protection.
Trivex. They’re made from a newer plastic that’s similar to polycarbonate lenses. They’re lightweight, thin, and impact-resistant. They may also correct your vision better for some people.
High-index plastic. If you have a strong prescription these lenses are lighter and thinner than the old-school super-thick ones you may have had in the past. Available in 1.67 index for up to 35% thinner. Also available in 1.74 index which is the thinnest lens material available for up to 50% thinner lens than CR-39 lens material.
We hope this information is able to help inform you and help you make a decision on the right lens material for you. If you have any questions please do not hesitate to contact us through our email.