1 Print the ruler

Print this page at 100% sizeusing the NO SCALING setting

2 Fold

Fold along the dotted line at the bottom of the page


3 Look in a mirror or find a friend

Stand 8 in. (20 cm.) away from a mirror or a friend. Place & hold the PD ruler against your brow. Keep your face straight.


4 Close your eyes

Close your right eye and align the ruler’s zero to the center of your left pupil.

5 Reday. set. measure.

Try to not move your head or the ruler. First 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 PD in millimeters.

What’s PD?

The Pupillary Distance (PD) is the distance between the pupils of the eyes, center to center, in millimeters. PD is important as it helps the lab technician to accurately create your eyeglasses frames by lining up your pupils with the center of the lenses.

Specade Tip

  • arrow-199-xxlMeasure this paper against a ruler to assure printout is accurate.
  • arrow-199-xxlMost adults have a PD between 54 – 74mm.
  • arrow-199-xxlMost childern have a PD between 43 – 54mm.
  • arrow-199-xxlTake a few measurements for consistency.