High-Index Lenses: When Are They Worth It?
High-index lenses bend light more efficiently, so the same prescription needs less material. The result is thinner, lighter glasses.
The index number
Standard plastic is about 1.50, polycarbonate 1.59, and high-index options go from 1.60 to 1.74. A higher number means a thinner lens.
Who benefits
Prescriptions from about ±4.00 and above notice the difference most. With low prescriptions, the gain is small.
At Verly
Ultra Thin (+$59) and Ultra Thin Pro (+$89), our thinnest option for strong prescriptions.
Frequently asked questions
Are high-index lenses heavier?
No, they are usually lighter because there is less material.
Do they need anti-reflective?
Yes, recommended. High-index lenses reflect more light.
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This guide is for information only and does not replace an eye exam. If you have eye pain, sudden vision loss or flashes of light, see a doctor right away.