PD (Pupillary Distance) is a measurement of the distance between your pupils. We need this so that we can make your glasses with the centre of the lens sitting directly in front of your pupil.
Your optometrist will measure your PD when fitting your frames. If you have your prescription, but don't know your PD and are buying glasses online, you can measure it yourself quickly and easily.
Stand 30cm away from a mirror and place a ruler against your eyebrows. Close your left eye and take note of the measurement at the inner corner of your left eye. Open your eye and then close your right eye, taking note of the measurement at the outer corner of your right eye.
Your pupillary distance is the distance between these two points. For reading glasses subtract 3mm.
Stand 30cm away from each other and have the other person hold a ruler against your eyebrows and place the 0mm marker at the centre of your left pupil. Then, have them measure to the centre of your right pupil
Your pupillary distance is the distance between these two points. For reading glasses, subtract 3mm.
Now you can use our quick and easy online tool with your mobile phone or laptop camera.
Tips for a successful scan
Once you're ready to start, follow these instructions:
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