1. Accuracy self-check function
2. VD measurement function
3. It features consecutive measurement, direct point-sampling and high accuracy of orientation, with mechanical hairspring being used to level at the reflecting point of human cornea
4. Adopting line-shaped sensors of high definition advanced intellectualized electronic systems and digital display which allow the testing results more visible, legible and accurate.
5. The design of LED lamp-house and low-power consumption makes the battery life prolonged
6. The brightness of LED is adjustable
7. +2.00D compensation for the degree of eyesight is available
Specifications:
1. Range of measurement:
Binocular papillary distance: 45~82MM
Left or right papillary distance: 22.5~41MM
2. Absolute indication error: ≤0.5MM
3. Absolute dissymmetrical error: ≤0.5MM
4. Absolute rounding error: ≤0.5MM
5. Distance of target: 30CM~∞
6. Power source:
Voltage: DC3V
Specification: 5#AA battery
Quantity: 2 pieces
7. Time for automatic shut-off: About 1 minute after stopping operation, or turn it off manually.
8. Size: 22.1*16.6*6.3CM
9. Weight: 0.68KGDescription
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