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Feature:
Top-grade quality View Tester;
Elegant design of butterfly-shape appearance;
High grade plated-film used in all optic lenses;
Two colors for option( white and black)
| Technical Data | |
| Sphere powers range | ±16.75Dto-19.00D,with minimum reading 0.25D or 0.12D |
| (when+0.12D auxiliary lens or optional±0.12D lens is in use) | |
| Cylinder powers range | 0 to-6.00D,with minimum reading 0.25Dor0.12D |
| ( when auxiliary lens is in use) 0 to-8.00D | |
| ( when-2.00D auxiliary lens is in use) | |
| Astigmatic axis scale | 0 to 180°in 5°steps |
| Cross Cylinder | ±0.25D, reversal type（synchronized with astigmatic axis） |
| Rotary prism | 0 to20△D in 1△D steps |
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