How to Measure Your Pupillary Distance at Home
What is PD?
Pupillary Distance (PD) is the measurement between the centers of your pupils in each eye, ensuring that the optical centers of your lenses align with your pupils for optimal visual comfort. Your PD is typically listed on your prescription. The average PD range for adults is 57-72 mm.
Why is it important?
Pupillary Distance (PD) is crucial for ensuring that the optical center of your lenses is properly aligned with your pupils. Accurate PD measurement provides optimal visual comfort and clarity, preventing issues like eye strain, dizziness, and blurred vision.
What is single and dual PD?
Contact your eye doctor to check if they have this measurement on file.
How to Measure PD by Other People
1. Wearing glasses? remove them and look at something 10-20 feet away.
It also helps to be in a well-lit area with a clean background.
2. Have your friend hold the PD ruler over your eyes
place the zero to the center of your right pupil.
3. Read the measurement.
The number directly over the center of your left pupil is your PD.
Have your friend repeat the measurement a few times to make sure it’s correct.
How to Measure PD by Yourself
1. Stand about 8 inches or 20 cm away from a mirror.
It also helps to be in a well-lit area with a clean background.
2. Hold the ruler over your eyes. keep the zero over your left pupil.
3. Close your left eye, and open your right eye while looking straight.
The number directly over your right pupil is your PD.
*For reading glasses, you can deduct 3mm from your PD measurement.
Printable PD ruler
Print the PD ruler at 100% size, without using the 'scaling' or 'fit' options.
Make sure to measure it with a millimeter ruler to confirm accuracy.
