Pupillary Distance Explained

PD stands for PUPILLARY DISTANCE. The PD is the distance from the centre of one pupil to the centre of the other.

This measurement is used to ensure proper lens placement within your frame.

If you would like to measure your PD at home all you need is a mirror and a ruler. You can carry this out yourself or alternative ask a friend or family member to take this measurement for you.

  • Look straight ahead into the mirror/directly in eyes of the person measuring (sitting about an arm's length away)
  • Using a ruler held against your forehead and bridge of your nose place the zero mark of the ruler at the centre of one pupil.
  • Write the measurement of the centre of the other pupil (please note the measurement in millimetres).
  • Repeat these steps 2-3 times to ensure an accurate measurement has been obtained.
  • Most PD's range between 55-75 mm. With an average of 63 mm
  • Make sure you are looking straight at all times.

If you are still unsure most optical stores will measure it for you. If however, for any reason you are not able to obtain this measurement don't worry! We use an average PD measurement of 63mm for distance and 60mm for reading which has been set as standard by our Dispensing Opticians.