1.56 semi-finished lens combines blue light protection with progressive vision correction in a single optical solution. The lens material incorporates special filtering technology that blocks 40% of harmful high-energy blue light (400-455nm) while maintaining optimal color balance and visual clarity, along with 100% UV protection. As a semi-finished blank, it enables optical labs to customize freeform progressive designs with precise distance, intermediate, and near vision zones tailored to individual prescriptions.
| SF 1.56 UV420 BLUE CUT PROGRESSIVE HMC 75/12&14MM | ||||||||
| Material Refractive Index=1.56 Tooling Index=1.530 | ||||||||
| DIA (mm) | Nominal Curve |
Front Radius(mm) |
Front Curve |
Rear Curve |
C.T (mm) |
E.T (mm) |
Front Sag Ring 50mm |
Rx Range |
| 75 | 2.00 | 378.57 | 1.40 | 5.00 | 9.00 | 15.00 | 0.53 | -3.25 to -6.00 |
| 75 | 4.00 | 155.88 | 3.40 | 5.00 | 7.00 | 8.65 | 2.02 | -1.00 to -3.00 |
| 75 | 6.00 | 92.98 | 5.70 | 5.00 | 9.20 | 7.50 | 3.42 | +0.25 to +3.00 |
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