Wednesday, February 29, 2012

What Are High Index Lenses For Eyeglasses?

By Adriana Noton


With so many different styles and colors available for glasses, it is hard to choose a pair that is right for you because there is so much variety. An important component to consider is in fact the thickness of your glasses lenses. Nobody wants to walk around with thick lenses on their glasses if they don't have to. Luckily, there is a type of eyeglass lens called high index lenses that can help you to have thinner lenses without having to sacrifice corrective power.

When you wear a pair of prescription eyeglasses, the incoming light rays are bent in such a way so they are focused correctly on your retina. If you require a stronger prescription and more corrective power, the light must be bent even more, and thicker lenses must be used. High index glasses lenses are able to bend the light with greater efficiency, increasing what is known as the refractive index of the eyeglasses. The higher the refractive index, the more efficient the lenses will be at bending the light and the thinner they can be.

Of course, using a variety of materials to create thinner lenses usually means it's going to cost more. You aren't likely to find many pairs of cheap eyeglasses that have high index lenses. Promotions and other specials at specific retailers might nab you a pair of discount glasses with high index lenses, but don't hold your breath.

Wearing glasses with high index lenses at full price or with discount glasses will typically provide a handful of benefits. Since the lenses are thinner, they're also usually lighter which makes them more comfortable to wear. The lenses are also usually flatter and fit closer to your face making them less bulky and noticeable. For people with very strong prescriptions, high index lenses allow them to choose lighter frames that might not normally contain the thickness of the lens. Sometimes with thicker lenses, you can see just how thick they are when they are set in the thinner, contemporary frames. By using, high index lenses, they won't be as noticeable and you can have greater freedom in choosing your frames.

If you end up feeling the need for thinner lenses, or you know that your glasses prescription is a strong one, talk to your optician about high index lenses. High index lenses for eyeglass frames for women are available in many different materials and not all of them are suitable for every prescription. You'll have to run through your options and try to fit your glasses within your budget after the high index lens cost has been added. If you are talking about high index lenses, also ask about anti-glare protection. Since more light is entering the lens, having a strong anti-glare factor is important. Without it, the glasses with high index lenses won't look as nice from the outside looking in or the inside looking out.




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