measure pupillary distance yourself

To perfectly tailor your new glasses to your eyes, we need your pupillary distance (PD). Which is the distance between the center of your right and left pupil, measured in millimeters. This value is often listed on your glasses prescription. If it’s not, you can easily measure it yourself using our online PD meter. Here, we’ll explain exactly what pupillary distance is, why it’s important, and how to measure it.

Prescription lenses always have an optical center. That's the part of the lens that gives you the sharpest vision. To position this center exactly in front of your eyes, we need your pupillary distance (PD). This ensures that your glasses provide the perfect correction and the most comfortable viewing experience.

Your pupillary distance is usually listed on your glasses prescription, marked PD, followed by one or two numbers in millimeters. For example, you might see 62 mm (a single value) or 31 mm and 31 mm (a separate measurement for each eye). If your PD isn’t listed, don’t worry! You can measure it yourself.

The fastest way to measure your pupillary distance (PD) is with our digital fitting tool, available on every product page. You can use a computer, laptop, or smartphone with a camera. During the fitting process, you’ll see a small circle labeled PD on the right-hand side. Simply click on it to start the measurement, and within seconds you’ll know your exact pupillary distance.

If your PD isn’t listed on your prescription and you prefer to measure it manually, you can also do so easily with a ruler.