Steps to measuring your pupillary distance(PD):   

1 - You will required a straight “mm” ruler, a pencil or pen and a mirror.

2 - Look straight into the mirror and place the ruler on the bridge of your nose.

3 - Make sure that the start of the ruler is directly below the center of one eye’s pupil.

4 - Hold the ruler and mark the location on the ruler of the other eye’s pupil.

5 - Measure the distance in millimeters between the two marks. That distance will be your PD.

6 - Repeat this process a couple of times to ensure you have an accurate measurement.
 

In most cases, PD value ranges from 57 to 65 mm, with the most common one being 63 mm. At times you will find PD written as 63/61. In such cases the first value is for Distance PD and the other value 61 is near PD. It is highly recommended to get your PD from your optometrist if you have a high power or if you are going to order bifocal, progressive or computer lenses.

How to take your pupillary distance (PD) photograph ready for upload

1. Remove your glasses and sit in a well-lit area with a plain background.

2. Hold a typical loyalty card, 8.5 x 5.4cm, against your forehead with two fingers just above your eyes.

3. Take a picture whilst keeping your head straight and looking directly at the camera.