1.Best price in china. 
2.External Test 
3.classical model 

 

Fuction:SPH,CYL.AX,Motorized chin rest ,on screen display
Specification :
Sphere:-20D-+20D,0 to +/-10D( increments 0.25D), +/-10D to +/-20D(increments 0.5D)
Cyliner:0D-+/-6D(increments 0.12D)
Axis :0.-180.(increments 1.)
Pupil distance:Max82mm(increments 1mm)
Vertex distance :N/A
Min pupil size:N/A
Monitor size :6 inch
Dimensions(mm) :51*31*48
Weight:approx 13kg

Printing :Dot Matrix printer