As part of our professional services, we are providing this easy-to-understand review of modern lens technology availablefor your new eyewear.

LENS MATERIALS

HARD RESIN (plastic)

Conventional hard resin lenses are half the weight of glass lenses and can be tinted to almost any color and density. Hard resin lenses are more easily scratched than glass but can have an optional scratch protectant applied. More impact resistant than glass, hard resin lenses do not require tempering.

LIGHTER, THINNER LENSES

Modern technology has created lenses that bend light differently so that stronger corrections are thinner than when made in conventional materials. Such lenses are called "high-index" and stronger corrections are more attractive because they are slimmer. Glass lenses are also available with the slimming advantages of High index but are considerably heavier. High index plastic uses less material so they are lighter in weight. High index lenses absorb all harmful UV light and can be tinted to any shade or color.

LENSES THAT DARKEN IN THE SUN/DRIVEWEAR

These are lenses that darken as you go from indoors to outdoors. They are available in both glass and lightweight hard resin. They darken to a moderate shade of grey. Ask for a demonstration of photosensitive lenses. Transitionals are the most popular photochromic lens in America.

POLYCARBONATE/TRIVEX

Polycarbonate lenses are the most impact resistant lenses available and are always the lens of choice for young people and active patients. They are high-index and are usually the lightest, most comfortable lenses. They absorb all harmful UV light and can be made with ultra thin edges because of their unique strength.

GLASS

For years glass the only lens material available and glass still offers superior optics. The most scratch-resistant material, the primary disadvantage of glass is its weight, generally twice that of hard resin. Glass lenses are heat or chemically treated to increase impact resistance.

For more information, visit your nearest Chester County Opticians Store and pick up a free copy of the Lens Menu brochure.

Contact chestercountyopticians@verizon.net with questions or comments regarding this site.
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