Sphere powers range
+16.75D to-19.00D
Cylinder power range
0 to-6.00D
Astigmatic axis scale
0 to 180 in 5 steps
Cross cylinder
0.25D, reversal type (synchronized with astigmatic axis)
Interpupillary adjustment
48mm to 80mm in 1mm step (right and left synchronized)
Forehead rest adjustment
16mm backward and forward
Interpupillary distance enabling converg
=57mm to 80mm
Corneal distance device
2mm forward and 5mm backward from standard plane; with scale
Effective field of view
19mm