Customized support
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Sphere powers range
+16.75D to-19.00D, with minimum reading 0.25D or 0.12D
Cylinder powers range
0 to-6.0OD, with minimum reading 0.25D or 0.12D
Astigmatic axis scale
0° to 180°,each step is 5°
Cross cylinder
+0.25D, reversal type also can select +0.50D
Rotary prism
0 to 20D , each step is 1D
lnterpupillary adjustment
50mm to 80mm , each step is 1mm (right and leftsynchronized)
Forehead rest adjustment
16mm backward and forward
Corneal distance device
2mm forward and 5mm backward from standard plane withscale
Effective visual range
19mm