Features
1. Elegant butterfly-shaped design
2. Can check all-round visual functions, precise and comfortable to measure
3. Exquisite manufacturing technology with a pleasant feel
4. This device is suitable for the eye department of hospitals and eyeglass shops for the precise measurement of visual functions such as myopia, hyperopia, astigmatism, visual balance, heterophoria, stereoscopic vision, and amaggamation of vision
5. Color options: White or Black
Specifications
Spherical power range:
+16.75D to -9.00D, with a minimum reading of 0.25D or 0.12D
(When using a +0.12D auxiliary lens or optional ±0.12D lens)
+26.75D to -29.00D
(When using an optional ±10.00D lens)
Cylindrical power range:
0 to 6.00D, with a minimum measurement of 0.25D or 0.12D
(when using an auxiliary lens)
0 to -8.00D
(when using a 2.00D auxiliary lens)
Astigmatic axis scale: 0 to 180 in 5 steps
Cross cylinder: ±0.25D, inverted type (synchronized with the astigmatic axis) ±0.50D optional
Rotating prism: 0 to 20ΔD in 1ΔD steps
PD adjustment: 16 mm backward and forward
Forehead rest adjustment: 2.0 mm
Convergence:
The optical axes of the lenses are aligned at a distance of 400 mm from the vertebrae of the cornea.
(2 mm inward for right and left) Eye relief allowing convergence = 57 mm to 80 m
Front sight extension device: 2 mm forward and 5 mm backward from the standard aircraft: with scale
Effective field of view: 19 mm
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