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How to Measure Your Pupillary Distance Without Credit Card or Leaving Home

Aug 30, 2022 · 3 minutes read
How to Measure Your Pupillary Distance Without Credit Card or Leaving Home

Measuring pupillary distance used to be a process that involved preparing a credit card to align in front of the camera or traveling to an optometrist. Thankfully, those days are behind us! Now there are several ways to measure pupillary distance without preparations or leaving home. In this blog post, we will discuss two methods: online and with an app. Let's get started!


What is PD?

Pupillary Distance (PD) is the distance between the centers of the pupil in each eye. It is important to measure pupillary distance when fitting glasses or contact lenses, as this ensures that the optical center of the lens is in line with the pupil to improve the visual acuity of the customers and prevents eye strain.

The average pupillary distance is between 55-70mm, but it can vary depending on age, ethnicity, and other factors. If the customers want to measure PD, there are a few common ways they can do it at home.

Single PD

Single pupillary distance (SPD) is the distance between the centers of the two pupils in your eyes. This measurement is generally recorded in millimeters (mm).

Single Pupillary Distance

Dual PD

Double pupillary distance (PD) is a measurement of the distance between the center of one pupil to the center of the other. So you'll have the PD left, and a PD right.

 Dual Pupillary Distance

Pupillary Distance Changes

Pupillary distance (PD) is the distance in millimeters between the centers of the pupils in each eye. It is important to have an accurate PD measurement when ordering glasses or contact lenses, as this will ensure that the eyewear is properly aligned with the eyes. While PD can remain relatively stable over time, it can also change on a day-to-day basis. 

 The pupillary distance of the same person may vary.

Factors such as fatigue, dehydration, and certain medications can all cause PD to vary. As a result, it is important to measure the PD each time glasses or contacts are ordered. With today's technology, this can be easily done using a smartphone app or an online PD tool.

How to Measure Pupillary Distance (PD)

Measure pupillary distance online or with an app


The first and easiest way is to use an online measuring tool to get an accurate result. The current AI technology is able to quickly measure the distance between two pupils by scanning their faces from mobile devices or desktops.

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Measure by ruler

Measure PD with rulers.

hold a ruler or other straight edge against the bridge of the nose and measure from the center of one pupil to the center of the other. It is best to do this with someone else's help, as it can be difficult to gauge one's own PD accurately.

Why Do We Need to Measure PD - Integrate the PD measurement to virtual glasses or sunglasses try on

As anyone who has shopped for glasses knows, it is important to know your pupillary distance (PD). Most people don't know their PD, and as a result, they have a less-than-ideal experience when shopping for glasses. 

When they go to pick out frames, they have no way of knowing if the glasses will actually fit their face. Then, when they go to check out, they find out that they need to provide their PD in order to complete the purchase. 


This can lead to canceled orders and frustrated customers. It is therefore very important for businesses who sell glasses to make sure that they know the customer's PD before they start shopping. By doing so, they can ensure a better customer experience and reduce returns.

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How Does Puppilary Distance Auto Detection Ensure Smooth Virtual Glasses or Sunglasses Try-Ons?

Perfect Corp.'s AI technology can automatically measure the distance between pupils. With this technology, online shoppers can try on digital 3D glasses and virtual sunglasses that perfectly fit their faces. 

Today, consumers expect a high degree of customization and personalization when shopping for products online. This is especially true when it comes to buying eyeglasses, which are highly personal items. In order to meet this demand, many brands are now offering a hyper-realistic virtual try-on experience that allows customers to see how the glasses look on their own faces.



With this, brands can offer a fully customizable experience that allows customers to choose from a wide range of frame colors, sizes, and styles. Additionally, they can adjust the lens tint to find the perfect pair of glasses for their needs.

This helps to eliminate the guesswork involved in choosing the right frame size and ensures that customers are happy with their purchase. 


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FAQs

How important is PD accuracy?

It is important to have an accurate pupillary distance measurement when ordering glasses or contact lenses, as this will ensure that the eyewear is properly aligned with the eyes. While pupillary distance can remain relatively stable over time, it can also change on a day-to-day basis. Factors such as fatigue, dehydration, and certain medications can all cause the pupillary distance to vary. As a result, it is important to measure the pupillary distance each time glasses or contacts are ordered.

What is the average PD for a woman?

On average, the pupillary distance for women is 63 millimeters. This number can vary slightly from person to person, so it's important to measure your pupillary distance accurately. PD is especially important when ordering glasses or contact lenses, as an incorrect measurement can cause the eyewear to be out of alignment with the eyes.


Get expert advice from Perfect Corp. and be part of the beauty tech trend. Contact us for details on beauty tech solutions trusted by 400+ brands globally

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