How do High Index Lenses Work?

High index lenses are like magic when it comes to strong prescriptions; what’s the trick?

How do High Index Lenses Work?

High index lenses are the thinnest lenses you can get, and they’re great for anyone with a strong prescription who wants a thinner profile on their glasses. But how do high index lenses work? Why are they so much thinner?

The refractive index, or index, of a lens is its efficiency at bending light. So, for instance, water bends light relatively weakly, but diamond reflects light very efficiently. A drop of water and a drop-sized diamond will have very different effects on light passing through them, even though they are both the same size.

This is the trick of high index lenses. They bend light more efficiently than standard index lenses, allowing them to be made thinner than standard lenses in prescription glasses.

How do high index lenses work?

  • High index lenses bend light more efficiently than standard index lenses. The higher the index, the less material is required for the same prescription.
  • Sometimes, a lens’s index is higher simply because the material is more dense. Other times, the index is higher for more complicated physical properties of the lens.
  • High index lens materials are made of completely different materials than standard index materials, though they still fall into either plastic or glass categories.
  • It is true that lenses get thinner as the index increases, but there are other things to take into consideration with them. For instance, if you have a medium prescription, there isn’t going to be much of a difference in thickness between 1.70 and 1.74, but since 1.74 is denser, 1.70 may actually be a bit lighter in weight.
  • How do high index lenses work? They’re simply better at bending light than standard index lenses!

If you’re looking for the thinnest lenses possible, high index lenses are the way to go.

Shop High Index Glasses

If you’re a high prescription wearer or if you’re unhappy with the thickness of your lenses, high index lenses are the way to go. High index lenses are the thinnest lenses money can buy.

Whether to get high index 1.70, 1.80, 1.64, or any others is another story, however. If you are wondering which type of high index lenses are best for you, take a look at our other blog posts or leave a comment below with your prescription and the qualities you’re looking for in your lenses. We’ll help you find the material that’s best for you. Thanks for reading!

Guide to High Index Lenses

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