How to Measure Pupillary Distance
What is Pupillary Distance (PD)?
Pupillary Distance (PD) or interpupillary distance (IPD) is the distance (the industry standard is to measure in millimeters) between the centers of the pupils in each eye. This measurement is used when preparing to make prescription eyeglasses.
How To Measure Pupillary Distance for Children?
STEP 1 : Print the below file at Actual Size using 100% scale on a standard letter (8.5” X 11”) size sheet of paper. To ensure that the ruler on this page is printed at the correct scale ONLY Adobe Acrobat or Adobe Reader via IE, Firefox, or Safari should be used. Other browsers including Google Chrome may use a default PDF viewer which will not print to the correct scale; users with these browsers should first save this file to their computer and open it directly in adobe acrobat for accurate results.
STEP 2 : Hold the below ruler just below your child’s eyes, keeping it exactly horizontal, and align the ruler’s zero (0) measurement to the center of your’s child’s right eye pupil.
STEP 3 : Try your best to hold the ruler sitll and ask your child to hold as still as possible, and read the millimeter line that lines up with the center of your child’s left pupil. This is your child’s PD measurement.
STEP 4 : Repeat steps 1 - 3 at least one more time to ensure you get the same measurment. This will ensure the most accurate prescription for your child.
STEP 5 : Please write your PD # on your prescription from your eye doctor. And email to us at firstname.lastname@example.org