User`s guide

1. ON/OFF Button (MAIN)
Press to turn the instrument on and off. The
PDM turns off after one minute to ensure
longer battery life.
2. Measurement Slide Controls
Used to move the index lines that indicate
Pupillary Distance and Right/Left Nose-to-
Pupil Distance measurements.
3. Distance Dial
Rotate to measure inter-pupillary distance at

4. PD/LD button
Changes between pupil distance (PD) and
vertex distance (LD) modes.
5. LCD Screen
Measurement data is displayed on the LCD.
 

the index lines and the patient’s eyes.
 
 
operator.
8. Patient Windows

these windows.
9. Nose Support
Used to stabilize the PDM against the
patient’s nose.
10. Forehead Support
Used to stabilize the PDM against the
patient’s forehead.
11. Battery Compartments
Accepts 2 AA batteries in each side.
12. R/L Occluder lever
Used to occlude the right or left eye
for monocular nose to pupil distance
measurement.
Features and Functions
Page 2
15020-101 Rev B