1. Elegant design of butterfly-shape appearance
2. Capable of checking up all-sided visual functions, precise and comfortable in measurement
3. Exquisite manufacturing technique, with comfortable feel
4.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
5.Three color options:White or Black or gray
Features
1. Elegant design of butterfly-shape appearance
2. Capable of checking up all-sided visual functions, precise and comfortable in measurement
3. Exquisite manufacturing technique, with comfortable feel
4.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
5.Three color options:White or Black or gray
Specifications
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) |
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) ±0. 50D optional |
Rotary prism | 0 to 20ΔD in1ΔD step |
PD adjustment | 16mm backward and forward |
Forehead rest adjustment | 2.0 mm |
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 |
