What are High Index Lenses?

Eyeglass lenses correct the people's eyesight by bending the light as it passes through the lens glass. How much the lens bends the light is called the lens power, and this is what your eyeglass prescription usually indicates.

high index lens 2
Most eyeglass wearers are Myopic i.e. nearsighted, meaning their lenses are curved with thin centers and thick edges. The stronger the prescription, the thicker the edges. For people with particularly strong prescriptions, this can result in the infamous “bottlecap” lenses, with particularly thick edges that are cumbersome and aesthetically unappealing. With today’s modern styles featuring thin rims, these thick lenses are even more problematic.

high index lens
High index lenses essentially have more light-bending power than normal eyeglass lenses. This means thin high-index lenses can have the same lens power as a pair of bottlecap lenses. The result is a pair of lenses that are thinner, lighter, and more aesthetically pleasing than traditional lenses.

High index lenses have a flatter curve than their lower-index counterparts for a reduced lens profile. A flatter curve, however, can cause off-axis blurred vision.

High-index eyeglass lenses are the right choice if you want thinner, lighter lenses and eyeglasses that are as attractive and comfortable as possible.

Hi-index lenses are perfect for:

  • People with +/- 2, and stronger prescriptions
  • People who are self-conscious about the thickness of their lenses
  • People who wear contacts because traditional lenses distort their eyes
high index lens vs normal index

Advantages of High-Index Lenses

  • Thinner
  • Lighter
high index lens


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