How to measure your PD?
What is PD (Pupillary Distance)?
Pupillary distance measures the space between the pupils of your eyes. Knowing this measurement is important to make sure your eyes match up with the optical center of your lenses. The average adult’s PD is between 54-74; kids' are between 43-54.
How to Measure Your PD?
If this number was not provided on your prescription by your eye care professional, you can measure it yourself. Here are the step to measure correctly:
1. Stand in front of a mirror.
2. Place a mm ruler against your brow (horizontal).
3. Measure the distance from the center of your left pupil to the center of your right pupil.
4. But for accuracy, repeat a couple of times and use an average for your final measurement. Then you get your PD.