Top-grade quality View Tester;
Elegant design of butterfly-shape appearance;
High grade plated-film used in all optic lenses;
Sphere powers range
(when+0.12D auxiliary lens or optional±0.12D lens is in use)
(+26.75D to-29.00D（when optional±10.00D lens is in use）
( when auxiliary lens is in use) 0 to-8.00D
Cylinder powers range
0 to-6.00D,with minimum reading 0.25Dor0.12D
( when-2.00D auxiliary lens is in use)
Astigmatic axis scale
0 to 180°in 5°steps
Cross Cylinder
±0.25D, reversal type (synchronized with astigmatic axis)
Rotary prism
0 to20△D in 1△D steps
