What does PD stand for?
PD stands for pupillary distance.

What does this mean?
Your PD is the distance between the centers of each pupil. This is a necessary measurement because it ensures the correct position of your lenses within the frame you have chosen.

How to measure your PD:
1. Download and print our PD ruler by clicking here.

NOTE: Do not “Resize” or “Shrink to Fit” on your printer settings.
The ruler should be printed at actual size for the most accuracy.

2. Cut the ruler template along the solid outer line and fold along the dotted line.

3. Place the ruler on the bridge of your nose and measure the PD values for each eye.

-You can measure your PD yourself using a mirror or you can ask a friend to help.
-If each eye has the same PD value, just add them together to indicate your PD.
-If each eye has two different PD values, they can be entered separately by checking the “I Have Two PD Numbers” box:

-When entering two different PDs, always enter the right eye PD first.
-Most adults’ PDs are between 55-65.
-Most kids’ PDs are between 42-54.

If you’re having trouble seeing out of your glasses there may be something off with your PD. People who have inaccurate PDs often complain about a “fun house” affect, and things seemed stretched. Another complaint is feeling pain in the center of your forehead, similar to how you would feel after crossing your eyes. If you believe your PD may be off, use our ruler to measure it or get your PD from your doctor or a licensed optician.