1. Sphere power Range:
+16.75D to-19.00D, with minimum reading 0.25D or 0.12D
(when+0.12D auxillary lens or optional ±0. 12D lens in use)
+26.75D to-29.00D
(when optional ±10.00D lens is in use)
2. Cylinder power range:
0 to-6.00D, with minimum reading 0.25D or 0.12D
(when auxiliary lens is in use)
0 to-8.00D
(when-2.00D auxiliary lens is in use)
3. Astigmatic axis scale: 0 to 180° in 5°steps
4. Cross cylinder: ±0. 25D, reversal type (synchronized with astigmatic axis) ±0.50D optional
5. Rotary prism: 0 to20ΔD in1ΔD step
6. PD adjustment: 48mm to 80mm in 1mm step(right and left synchronized)
7. Forehead rest adjustment: 16mm backward and forward
8. Convergence:
The optical axes of the lenses are aligned at a distance of 400mm from the vertexes of the comeas
(2mm each for right and left inward) Interpupillary distance enabling convergence=57mm to 80mm
9. Corneal distance device: 2mm forward and 5mm backward from standard plane: with scale
10. Effective field of view: 19mm