Flat Top 28 Gray Bifocal - 1.53
Index
| Add Range = 1.00 - 3.50D | ||||||||||
| Diameter | Nominal Curve | True Curve | Back Curve | Edge | Center | Seg Drop | Seg Inset | SAG at 50 | Radius | Recommended RX range |
| 74 | 2.25 | 2.31 | 4.25 | 14.0 | 12.5 | 5.0 | 6.0 | 1.35 | 229.44 | -5.25D/-9.00D |
| 74 | 4.25 | 4.33 | 6.25 | 14.5 | 12.0 | 5.0 | 6.0 | 2.58 | 122.40 | -2.25D/-5.00D |
| 74 | 6.25 | 6.34 | 6.25 | 8.0 | 8.0 | 5.0 | 6.0 | 3.83 | 83.46 | +2.25D/-2.00D |
| 74 | 8.25 | 8.36 | 6.25 | 8.5 | 11.5 | 5.0 | 6.0 | 5.15 | 63.25 | +2.50D/+7.00D |