Print PD ruler
Print PD ruler at 100% size.
Do not use ‘scaling’ or ‘fit’ setting.
Print setting should be ‘actual size’.
Fold printout along the dotted line.
Mirror or Friend
Stand 8 inches (20 cm) away from a mirror or a friend. Place & hold the PD ruler against your brow. Keep your face straight.
Ready. Set. Measure!
Align to Zero
First, close your right eye and align the ruler’s zero to the center of your left pupil.
Open Right, Close Left
Next, open your right eye and close your left eye.
Look straight ahead and read the millimeter line that matches up with the center of your right pupil. This number represents your single PD in millimeters.
PD Ruler Preview
Note: web view not to scale.