How To Measure Your PD

Printable PD Ruler

Print this page on A4 paper at 100% scale (do not resize). Use the PD ruler located at the bottom of the page. For the most accurate results, we recommend using a physical PD ruler or consulting your eye care professional.

Download Zeelool's PD rulerDOWNLOAD ZEELOOL'S PD RULER

Note: Please Printed on A4.

• Step 1

  Stand approximately 8 inches (20 cm) away from a mirror, or ask a friend to help you at arm's length. Repeat the measurement 2–3 times for accuracy.

  

• Step 2

  Close your right eye and align the "0" mark on the ruler with the center of your left pupil.

  

• Step 3

  Close your left eye and read the number directly over your right pupil. This number is your Total PD.

  

• Step 4

  To get two separate PD values (for each eye), measure the distance from each pupil to the center of your nose. This is helpful if you need Dual PD (OD & OS).