PD / VD, the distance of the pupil can be directly measured, and can be converted to near the pupil distance.
Ergonomic design, stainless steel forehead, soft rubber nose pad
CE certified
Size:220 x 170 x 60mm
Power: 5W
Effective measurement range: Eye pupil distance: 45-82mm
Monocular measurements: Left and right pupil diameter distance: 0.9 - 1.6 inches (22.5 - 41 mm)
Auto Shutdown Time: 30 minutes after stopping, can automatically shut down or manually shut down (you can set the time).
List: 1x PD Meter centimeter pupil distance meter