Lens Indexes - Select The Right Lens Material for Your Prescription Glasses.

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Lenses are available in different indexes. As a material's index increases, its ability to refract light increases as well, which means that higher index materials produce thinner lenses. Watch this video to find out more, and don't forget to use the 3D Lens Viewer on our website. During the check out process it is to see exactly how thick a lens will be!

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Video text transcript

What does lens index mean?

The word "index" refers to a materials refraction index: the way light bends as it passes through the material.

Different lens materials have different ways of bending the light. As the index increases, the ability to bend light increases.

Standard crown glass which was used for almost all glasses in the past has an index of 1.52. The modern plastic materials have indexes between 1.50 and 1.74.

Lenses get thicker as they get more powerful. Higher index lenses can help you have thinner lenses, even if you have a strong prescription.

1.50 Index lenses are fine for low prescriptions, but get thick quickly as prescription increases.

You may choose a mid-index lens, such as a 1.6 index lens, if you have a prescription that is medium strength.

For very strong prescriptions, high index lenses, such as 1.67 or 1.74 index, will reduce the weight and thickness of the lens.

Lens material characteristics also vary. Some lens materials are less appropriate for semi rimless and rimless frames, for instance.

The advantage of higher index lenses is that they are lighter and thinner. Thin lenses are associated with a more elegant look, whereas thick lenses often denote less of a sense for style.

Lens upgrades tend to be very costly in an optical shop.With our modest prices for lens upgrades, you can now look your best, without breaking the bank.

To make your shopping more convenient, we'll make recommendations for you, and provide you with the possibility to compare shape, thickness and weight for lenses of your choice.

We're here to help.
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Видео Lens Indexes - Select The Right Lens Material for Your Prescription Glasses. канала Visio-Rx