The Lens Index number (1.50, 1.57, 1.53, 1.59, 1.61, 1.67, or 1.74) refers to the degree of refraction the lens provides. This means how much the light that enters the lens is refracted (bent) as it passes through the lens. Lens Index is also related to the thickness of the lens. The higher the index, the thinner the lens will be. Learn more here about what index is best suited for your Rx, lifestyle, and frame selection.
- Which prescription lenses are right for me?
- What are Blokz Lenses?
- Which lens material should I choose?
- What are Trivex® lenses?
- What lens tints does Zenni offer?
- What is Blokz™ Trivex®? Is it a good lens option for kids?
- What's the difference between photochromic vs polarized lenses?
- Do you offer night driving lenses?
- What do the Lens Index numbers and high index mean?
- How do I get thinner lenses?