Featuring consecutive measurement, direct point-sampling and high accuracy of orientation, with mechanical hairspring being leveled at the reflecting point of human cornea. Using high-definition line-shaped sensor, advanced intellectualized electronic system and digital display to make testing result more visible, legible and accurate.
LED light source and low power consumption guarantee long battery life.
+2.00D eyesight compensation
Accuracy self-check function
VD measurement function
Range of measurement：Binocular pupillary distance: 45～82 mm
Left or right pupillary distance: 22.5～41 mm
Indication error： ≤0.5 mm
Rounding error： ≤0.5 mm
Distance of target： 30 cm～∞
Power source： Voltage：DC 3V
Specification：5# AA battery
Time for automatic shut-off:
About 1 minute after stopping operation, or turn it off manually.