How to Choose 1.56, 1.61, 1.67?

Numbers 1.56, 1.61, 1.67 on lenses mean lens index.

What is Lens Index?

Higher lens index = thinner & lighter lenses at the same prescription.
It affects lens thickness, weight, look and comfort.

How to Choose?

• 1.56: 0~300°, cost-effective for daily use
• 1.61: 300~600°, thinner and better-looking
• 1.67: Above 600°, ultra-thin, best for high prescriptions

Important Tips

Higher index is not always better—match your prescription.
Smaller frames make lenses look thinner.

Quick Guide

0~300° → 1.56
300~600° → 1.61
600°+ → 1.67