In short, the higher the index of the material the thinner and lighter the lens will be in a given prescription.Standard 1.5 index plastic - Conventional plastic lens. Light and durable, and can be supplied with all treatments and comes with anti scratch coating as standard.
Thin 1.59 index polycarbonate - Polycarbonate is as thin as our thin 1.6 index plastic lens and 12% lighter as standard. When combined with rimless titanium frames you will have the lightest combination available in rimless frames (featherweight). The construction of polycarbonate material also makes it extremely strong which is why it is used in rimless eyewear as the lens does not have a rim to give it strength.
Polycarbonate is also shock resistant, over 12 times more so than standard 1.5 index plastic lenses. Because of its strength and shock resistance polycarbonate is also used for safety spectacles.
Thin 1.6 index plastic - Up to 20% thinner than standard 1.5 index plastic and up to 25% lighter and when combined with full UVA and UVB ultraviolet light absorption it also acts as a protector for the eye from the suns harmful rays.
Super thin 1.67 index plastic - On average 15% thinner than the 1.6 index plastic and on average 15% lighter. This lens can be supplied with all treatments such as UVA and UVB protection as well as anti scratch and anti reflective coatings.
Ultra thin 1.76 index plastic - The thinnest and lightest lens material available. On average 10% thinner than super thin 1.67 index plastic and on average 10% lighter.
The ultimate material choice for higher prescriptions. This lens can also be supplied with all treatments.
http://www.glassesframesandlenses.com
About the Author:
I have over 18 years experience in various capacities of marketing, customer service and event management in the public and private sectors. This has placed me into specialising in online marketing and SEO, and as part of my SEO, I write articles for my clients.
On a private level, I enjoy a healthy lifestyle, cycling, horse-riding and running. I have two teenage children and two poodles, who are my wonderful companions.
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