1 Print this page at 100% size (No Scaling)
Download this file and open it in Adobe Reader.
Print using the following scale settings:
Windows: Set scale to “None” or at 100%
MAC: Set page scaling to “None”
2 Fold the PD ruler
Fold the PD ruler below along the dotted lines.
Use the appropriate side depending on if you
are using the mirror or a friend.
3 Line up the ruler’s zero
Place the ruler just above your eyes and line up
the zero of the ruler with the center of your
4 Measure your PD
Without moving you head or the ruler, mark
the ruler where it lines up with the center of
your right pupil. This number is your PD.