Sphere power Range

+16.75D--19.00D

with minimum reading 0.25D or 0.12D(When + 0.12D auxiliary lens or optional ±0.12D lens is in use)

Cylinder power range

0 to-6.00D, with minmum reading 0. 25 0.12D (When +0.12D lens s in use)

 0 to-8.00D(when-2.00D auxiliary lens is in use)

Cylinder axis Range

0° to1 80°each step is 5°

Cross cylinder

±0.25D, reversal type(synchonized with astigmatic axis), also can select±0.50D

Interpupillary adjustment

50mm to 80mm, each step is 1mm(right and left synchronized)

Rotary prism

0 to 20ΔD, each step is1ΔD

PD adjustment

48mm to 80mm in 1mm step(right and left synchronized)

Forehead rest adjustment

16mm backward and forward

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 80m

Corneal distance device

2mm forward and 5mm backward from standard plane; with scale

Effective field of view

19mm

Weight

5kgs