Range
+16.75 to -19.00 diopters
Cylinder Power
Step 0.25 diopters
Cylinder Axis
0 to 180°, 5°step
Cross Cylinder
+0.25 diopters
Rotary Prisms
(0)-Open aperture (two positions)
Rotary Prisms 2
(R)Retinoscopic lens, +1.50D
Rotary Prisms 3
(P)Polarizing lens 45-eft eye, 135-right eye
Rotary Prisms 4
(WMV) or (RMV)-Maddox rod, horizontal white-left eye red-right