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Old 03-26-2010, 03:08 AM
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Join Date: Jan 2010
Posts: 63
Default Why can high index lenses be much thinner?

Today, high index lenses are really popular, as they are much thinner and lighter than ordinary lenses in the same prescription, these lenses are made by material which has high index of refraction, the higher the refractive index is, the thinner the lens will be. but the price is usually expensive, you can try online site, it is much cheaper than those in local stores!
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