Print PD ruler
Print PD ruler at 100% size. Do not use ‘scaling’ or ‘fit’ setting. Print setting should be ‘actual size.’
Mirror or Friend
Stand 8 inches (20cm) away from a mirror or a friend. Place & hold the PD ruler against your brow. Keep your face straight.
Ready. Set. Measure!
Look straight ahead and read the millimeter line that matches up with the center of your right pupil. This number represent your single PD in millimeters.