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Pupillary Distance
1 Number PD
2 Number PD
What is PD?
If your PD consists of one number, also known as "Single PD", this is the pupillary distance between your pupils.
This is typically your distance PD measurement, unless it is noted as a near/reading PD.
The distance PD is usually between 40-80mm. You can also calculate near PD, used for reading glasses, by subtracting 3mm from your distance PD.
Learn how to measure, as well as understand the differences between single, dual and near PD by checking out our PD infographic and How-To-Video.
If your PD consists of two numbers, also known as "Dual PD", this is the pupillary distance between the centers of each pupil to the bridge of the nose.
It is written in the following notation: 32/30. The first number is the right eye, and second is the left eye. Both are less than 40.
Pupillary Distance (PD), the distance between the centers of your pupils, determines where you look through the lens of your glasses.
It should be as accurate as possible.
The average adult's single PD is between 54-74 mm; kids' are between 43-58 mm.Learn how to measure, as well as understand the differences between single, dual and near PD by checking out our PD infographic and How-To-Video.
