specifications︰ Specifications:
1. Sphere Power Range:+16.75 to -19.00D,with minimum reaing 0.25D or 0.12D

2. Cylinder Power Range: 0.00 to -6.00D,with minmimum reading 0.25D ro 0.12D (when auxiliary lens is in ues)0.00 to -8.00D(when-2.00D auxiliary lens is in ues)

3. Cylinder axis:
0 to 180, 5° step;

4. Cross Cylinder: ±25 diopters,reversal type(synchronized with astigmatic axis)

5. Rotary Prisms:
0△ to 20△, 1△ step;

6.Interpupillary adjustment: 48mm to 80mm in 1mm step (right and left synchronized)

7.Forehead rest adjustment: 16mm backward

8.Convergence: The optical axes of the lenses are aligned at a distance of 400mm from the vertex of the corneas(2mm each for right and left inwrad)

9.Interpupillary distance enabling convergence=57mm to 80mm\

10.Corneal distance device: 2mm forward and 5mm backward form standard plane;with scale

11.Effective field of view: 19mm

12.Size: 323x315x85mm

13.Weight:5kgs

14.Color Option:White or Black

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