PD or Pupilary Distance is the distance between the centers of each eye. Often it is not provided by your optometrist and taken by the optician when you place order for eyeglasses. It should be part of your prescription details, and therefore we highly recommend your request this PD value from your optician.

This value is measured in millimeters (MM) which is used to align the center of the lenses with the pupil. The PD measurement is particularly important for strong prescription. Incorrect PD may result in eye strain or headache.

If you do not have the PD on your prescription, you can measure it as shown below:

Step – 1 Place a simple mm ruler on your nose so that the starting point of the ruler is exactly at your left or right eye pupil. Keep the scale straight.

Step – 2 Stand in front of a mirror or ask a friend to measure the distance between the pupils while you look straight ahead.

Step – 3 Repeat this three times for accuracy.

In most of the cases, PD value ranges between 57 mm to 65 mm with most common being 63 mm.

You may find your PD presented as 63/61. This means the Distance PD is 63 and the near PD is 61. When ordering single vision lenses only the distance PD is required. For bifocals and progressives, please also provide the near PD.

Please feel free to call or email us with any questions

Toll Free 1.800.439.6628