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Measure Your Pupillary Distance By Your Self: 3 Simple Steps

Measure Your Pupillary Distance By Your Self: 3 Simple Steps

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2 min read

Measure your pupillary distance is incredible easy, all you need is your phone or and a ruler. you can download the PD ruler then print it, if you don’t have one at hand.

Here are the 3 steps to Measure your PD:


Stare at a point at 6-10 feet away and position the ruler line up on your eyes,


Use your phone direct in front of your face, active the front camera, and then take a photo.


Review the picture to identify the left edge of your left pupil and left edge of your right pupil, then you can see the distance in the ruler to identify your pupillary distance in millimeter(mm) For accuracy.

you can measure it multiple time, then calculate the average pupillary distance

Why measure from pupillary edge to edge?

Other website will tell you measure center you the pupil, but it not distinct, the edge of the pupillary will be more distinct.

Why use phone instead of mirror?

Unlike mirrors, phones eliminate the risk of hand shaking, if you use mirror that may cause wrong result.

Measuring Near PD

If you have progressive prescription, you need to measure near pd, follow the same steps but look downwards and close thing to measure, like look at your computer screen

Dual PD

In case your prescription list two numbers, e.g. (32/31), the first number corresponds to your right eye, the second number corresponds to your left eye.

Because prescription glasses lab usually prioritize the right lens production.

Average PD measurement.

Most pupils distances fall between 50-70(mm), average women pupillary distance is 58, average men pupillary distance is 64.

The Easiest Method:

You can also use our app, which simplifies PD measurement. Just focus on the camera, and our app will provide your pupillary distance. However, it’s need a newer iPhone.

understanding pupillary distance

Pupillary distance is the measurement between the centers of each of your pupils, it's in millimeters, it’s important value for crafting prescription glasses as it helps position the lens optical centers accurately.

Does pupillary distance change in time?

Typically, pupillary distance remains stable throughout adulthood. However, in children, it can change as they grow. Therefore, when purchasing prescription glasses for kids, it’s important to measure their PD each time.