1. Range of PD adjustments:PD of both eyes:50~76mm; Left or right PD:24~40mm,Minimum Calibration Value:1mm. 2. Axial calibration on each disc: Left disc:120°~0°~135°,Right disc:45°~180°~60°, Axial calibration increases counter clockwise along the lens frame axis, and the calibration distance is 5. 3. Inner diameter of lens frame:Φ38mm 4. The Number of lens which can be inserted into left or right lens frame simultaneously:4 pieces 5. Degree of lens rotating around optical axis in the lens frame:360° 6. Non-parallelism degree between lens' optical axis and lens frame's geometric axis:≤2.5° 7. Non-concentricity between lens' optical center and lens frame geometric center:≤0.5mm 8. Displacement of lens in relation to position of lens frame geometric center:≤0.3mm 9. Range of nose pad adjustment:Length:0~14mm,Angle:0°~30° 10. Range of left or right lens frame leg's length adjustment:98mm~135mm 11. Maximum interval between left and right lens frame legs:200mm
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