Features
Top-grade quality View Tester in Far East
Elegant design of butterfly-shape appearance
High grade plated-film used in all optic lenses
This device is applicable to ophthalmology department of hospitals and spectacle stores for precision measurement of visual functions such as myopia, hyperopia, astigmatism, eyesight balance, heterophoria, stereoscopic vision and eyesight amalgamation
Two colors for option(white and black)
Specification
Sphere powers range: +16.75D to－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 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)
Astigmatic axis scale: 0 to 180° in 5° steps
Cross cylinder:±0.25D, reversal type (synchronized with astigmatic axis)
Rotary prism: 0 to 20∆D in 1∆D step
Interpupillary adjustment:
50mm to 80mm,each step is 1mm (right and left synchronized)
Forehead rest adjustment:
16mm backward and forward
Convergence:
Theoptical axes of the lenses are aligned at a distance of 400mm from the vertexes of the corneas (2mm each for right and left inward)
Interpupillary distance enadling convergence=57mm to 80mm
Corneal distance device:
2mm forward and 5mm backward form standard plane with scale
Effective visual range:19mm
Weight:5kgs
Size:323mm*315mm*85mm