Sphere powers range
+16.75D to-19.00Dwith minimum reading 0.25D or 0.12D
Cylinder power range
0 to-6.00D, with minimum reading 0.25D or 0.12D
Astigmatic axis scale
0 to 180 in 5 steps
Interpupillary adjustment
48 - 80mm in 1mm step
Forehead rest adjustment
16mm backward and forward
Interpupillary distance convergence
57 - 80mm
Effective field of view
19mm