Single PD
STEP 1
Stand 8” away from a mirror.
STEP 2
Hold a ruler against your eyebrows.
STEP 3
Close your right eye, and align the ruler’s
0mm mark with the middle of your left pupil.
STEP 4
Open your right eye and close your left eye
STEP 5
Find the millimeter line that aligns with
the center of your right pupil.
Dual PD
STEP 1
Stand 8” away from a mirror
STEP 2
Hold a ruler against your eyebrows
STEP 3
Align the ruler’s 0mm mark with the
middle of your nose.
STEP 4
Close your left eye and find the millimeter line that aligns with the center of your right pupil. This is your right PD.
STEP 5
Close your right eye and align the 0 mark with the center of your left eye. Find the millimeter line that aligns with the center of your nose. This is your left PD.