How to measure your PD
Download Our PD Ruler
One of the key measurements required for making eyeglasses is the Pupillary Distance (PD). In most cases, your prescription would indicate the PD, but if it doesn't, you can follow the below steps to measure it yourself.
- Position the ruler on the bridge of your nose as illustrated in the image in the pdf.
- Adjust the position of the ruler such that the "0 mm" mark is directly above one of your pupils.
- If you are standing in front of a mirror, look straight ahead and note the number that is directly above the other pupil - This is your PD (If you have someone to help you measure your PD, please ensure that you are both at the same eye level)
- Repeat the above steps a few times to reduce the margin of error.
PD measures the distance between your pupils and is a key component in ensuring that your lenses are positioned directly in front of your pupils to guarantee perfect vision correction.
The chart below explains how to read your PD from your prescription.
PD can be indicated in 3 different ways in your prescription
| PD written as | Explanation | Example |
|---|---|---|
| PD (OU) | The total distance between your pupils | If the prescription states PD 62 - select the same number from the drop down menu. |
| PD (OD)/PD (OS) | The distance from the center of the bridge of the nose to the right (OD) and left (OS) pupil | If the prescription states 32/30 - add the 2 numbers and select that number from the drop down menu |
| Near PD Far PD |
Near - The total distance between your pupils for reading glasses Far - The total distance between your pupils for progressive/bifocal glasses |
If the prescription states 58/62 - 58 is your near PD and 62 is your far PD - select the respective numbers from the drop down menu. |