Cylinder Axis: 0 Degree to 180 Degree in 5 Degree step
Cylinder power: 0 to -6.0 D and 0 to -8.0 D ( with auxiliary cylinder lens at -2 D)
Pupillary Distance adjustment: 50 to 75 mm in 1mm step
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Product
Phoropter Ophthalmology Eyeglass prescription Autorefractor