
How to Measure Your PD?
1
Download PD ruler
Download PD ruler
Down load our PD ruler Or find a ruler with a millimeter scale.2

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.3

Align to Zero
First, close your right eye and align the ruler’s zero to the center of your left pupil.4

Open Right, Close Left
Next, open your right eye and close your left eye.5
