PD Measurement Tool

Measure your PD online

The Pupillary Distance (PD) is the distance between the centers of your pupils in each eye. This measurement is required to place prescription glasses orders. With this measurement we can ensure that the optical centers of your lenses are aligned correctly with your pupils to give maximum comfort and effectiveness.  

In most cases, your optician will include your PD measurement in your prescription after the eye examination. If not, just ask for it.

At Yesglasses, we have developed an easy and free online tool that measures your PD, with which you are able to buy all your future glasses online.

Please read How to Measure PD if you want to measure your PD manually at home.

Let's guide you on how to obtain your PD value online

1. Remove your glasses if you are wearing one

Natural light or bright environment also improves accuracy.

2. Put a card with a magnetic stripe on your lips

You can use your credit card or any card with a magnetic stripe to measure PD. Stick your lips to the card as the picture shows.

3. Look straight ahead and take a picture of your face

Adjust your camera, look directly at it, and take a picture. Please make sure that we can see your pupils clearly.