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Differences in High-Index Eyeglass Lenses

It used to be that poor vision meant you were stuck with thick eye glasses. Not anymore. High-index eyeglass lenses are another option with benefits over, and differences from, traditional glass or plastic glasses. Yet not all prescriptions are available in high-index versions. Talk with your eye doctor about whether your prescription and high-index lenses are a good match and the right choice for you.

  1. Lens Density

    • Traditionally, eyeglass lenses for those who are near-sighted have more material at the outer edges, giving them a thick-edged appearance. High-index lenses correct near-sightedness with less lens material than before. The same is true if you are correcting far-sightedness. Usually, the entire lens must be thick to correct this vision issue, but high-index reduces the overall thickness and offers a more attractive-looking option.

    Lens Material

    • High-index eyeglass lenses can be made with plastic or glass. Both provide better vision with less material so both are thinner. For those with strong prescriptions, high-index glass lenses can be even thinner than those made of plastic. Some individuals prefer the quality and type of vision they experience with glass, so a high-index option is available in glass. Keep in mind, though, that high-index options are more expensive if you need a stronger prescription.

    Lens Weight

    • High-index eyeglass lenses are also lighter than other lenses. This means less pressure across the nose and you will feel less heaviness on your face. They are also easier to carry and store. Getting a durable frame with high-index lenses will likely extend the life of your glasses and make them more practical for everyday use.

    Lens Glare

    • Also, high-index options reduce glare and night-vision problems. According to All About Vision's website, traditional glass and plastic will let less light into your eye. High-index options reflect 50% more light, making it easier to focus on objects. They also can have anti-reflective coatings added to them, which offer even clearer vision with far less glare at night when driving.

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