Find a metric ruler
And grab a friend so they can measure your pupillary distance in millimeters. Have them hold the ruler just under your eyes keeping the ruler exactly horizontal and line up the ruler’s (0) measurement with your right eye pupil.
That means your head, eyes and ruler as still as possible. Have your friend read the millimeter line that lines up with the center of your left pupil. This number is your PD measurement.
The above steps a couple times to ensure you get the same measurement. Let’s get this right for the best prescription possible.
Let us know
Write the PD number on your prescription and upload the picture at checkout or email the PD number with your order number to us at [email protected] with the subject line Pupillary Distance.