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Specifications
Specifications
1. Range of diopter measurement: from 0D to ±20D 2. Minimum scale value: 0.125D at 0D to ±5D, 0.25D at ±5D to ±20D 3. Astigmatism axis of cylindric lens: 0 to 180°, minimum scale value 5° 4. Prism base angle: 0 to 180°, minimum scale value 5° 5. Regulation of ocular visibility: ±5D 6. Size of lens: 30MM to 9OMM 7. Overall dimensions of device: 46*17*24 (CM) 8. Weight: 7.35KGS 9. Lighting lamp: 220V 25W/110V 25W