| Lens Material | Index | Recommended Rx Range |
|---|---|---|
| Plastic CR-39 | 1.49 | Up to + or -2.00 |
| Trivex | 1.53 | Up to + or -4.00 |
| Polycarbonate | 1.58 | Up to + or -4.00 |
| High Index 1.60 | 1.60 | Up to + or -6.00 |
| High Index 1.67 | 1.67 | Up to + or -8.00 |
| High Index 1.70 | 1.70 | Up to + or -10.00 |
| High Index 1.74 | 1.74 | Up to + or -12.00 |
