Pupillary Distance (PD)

Understand how to measure PD yourself in quick easy steps:

Measure yoyr PD

What is Pupillary Distance (PD)?

Pupillary Distance alias PD is the distance from the centre of the pupil of one eye to the other. PD is necessary for getting eyeglasses, to correct your vision. The measurement plays a vital part in determining correct positioning of your lenses within the frame. Especially, when you are looking for bifocal or multifocal lenses, PD is mandatory.

How to measure PD yourself?

What do you need?

You simply require:

Ruler Ruler (mm)
Mirror Mirror


  • Stand in front of the mirror, around 8 inches away
  • Keep your head straight and hold a millimetre ruler horizontally on the bridge of your nose
  • The 0 mm point of the ruler should be in line with the centre of the left pupil (the black dot which you can see inside your eyeball)
  • Measure across, from the centre of left pupil to the centre of right pupil. Make sure you hold the ruler steadily. The measurement which you get is your pupillary distance
  • Repeat the above step 3, 4 times constantly, so that you get the accurate measurement

That's it, your PD is ready.

Things to Note:

  • Usually in case of bifocal or multifocal lenses, two PD will be required. It is better to get PD recommended from your eye doctor / eye care professional
  • The range of PD for adult is 54 - 74 mm and for kid is 43 - 54 mm

With your PD and prescription, you can order perfect pair of glasses at Framesbuy and enjoy enhanced vision.

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