A2 Crown
12mm Corridor Progressive New Design
A2 Vision Technologies provide new generation of progressive short corridor design - super-short corridor 12mm "Crown". The fitting cross is 2mm above the optical center and the recommended fitting height is 15mm.
Benefits of the design:
short corridor progressive design.
clear reading zone - the best solution for the super-short frames.
Cylinder Map
Power Map
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Corridor section
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Technical Data
| Diopter | mm | |
| Distance Width (2mm above MRP) | 0.5D 1.0D |
9.2mm 16.5mm |
| Distance Width (8mm above MRP) | 0.5D 1.0D |
30mm clear |
| Maximal nasal Astigmatism | -2.60D | |
| Minimum Corridor Width | 0.5D 1.0D |
4.8mm 8.8mm |
| Near Vision Width (12mm below MRP) | 0.5D 1.0D |
14.2mm 21.8mm |
| Fitting Cross (above MRP) | 2.0mm | |
| Start of progressive (above MRP) | 2.0mm | |
| End of progressive (above MRP) | 12mm | |
| Minimum Fitting Height | 15mm |
* Measured on base 4.50 addition 2.00D
Mold Availability
| Bases | 2.50 4.50 6.50 8.50 |
| Additions | 0.75 to 3.50 in 0.25D |
| Refractive Indexes | 1.498 1.56 1.60 1.67 |
Possibility to produce by Free-form machines and insert for polycarbonate.
Marking dimension
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