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.
- Lens Coatings Guide
- How do I get thinner lenses?
- Which lens material should I choose?
- What are Blokz Lenses?
- Which prescription lenses are right for me?
- What lens tints does Zenni offer?
- What are Trivex® lenses?
- What are 3D movie clip-ons?
- What is Blokz® Trivex®? Is it a good lens option for kids?
- What's the difference between photochromic vs polarized lenses?