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
Quantity? 2 pieces
Time for automatic shut-off? About 1 minute after stopping operation, or turn it off manually.