How to choose a suitable lens index
More higher index of the lens, more thinner lens.
| Lens index | Features | SPHÂ | CYL |
| 1.50 | •Standard | 0.00~-3.00 /+0.25~+3.00 | +/- 3.00 or below |
| 1.56 | • Thinner and lighter than standard lenses. | 0.00~-3.00/+0.25~+3.00 | +/- 3.00 or below |
| 1.59 | • Made with premium polycarbonate monomer . • UV protection. • Impact-resistant. | 0.00~-4.00/+0.25~+4.00 | -2.25 ~ -3.00 or +2.25~+3.00 |
| 1.60 | • Good abbe value | 0.00~-6.00/+0.25~+6.00 | -2.25 ~ -D4.00 or +2.25 ~ +3.00 |
| 1.67 | • Good choice for high power prescriptions. | -6.00~-10.00/+3.00~+6.00 | -3.25 ~ -4.00 or +3.25 ~ +4.00 |
| 1.74 | • Super thin for the high power perscriptions | -8.00~-15.00/+3.00~+6.00 | -4.25 ~ -6.00 or +4.25 ~ +6.00 |