Online Tool for Pupillary Distance

Pupillary distance (PD) refers to the distance between the center of your pupils. It is a crucial measurement when it comes to eyeglasses, as it determines where the optical center of the lenses should be placed.

If the PD is incorrect, it can lead to eyestrain, headaches, and even distorted vision. When it comes to PD Measurement, accuracy is crucial for any eyewear purchase, instore or online.

The Fittingbox Online PD Measurement Solution measures the distance between the pupils of the user with a proven accuracy of 1 mm for 7 out of 10 measurements. The accuracy is within 2mm of the actual measure in 96% of cases.

The average pupillary distance for men is 64 mm and 62 mm for women. However, it is important to note that individual PD can vary widely. The only and most accurate way to determine your pupillary distance is to use a PD measurement tool.

Unlike in-store shopping, you do not have the opportunity to try on different frames and make adjustments on the spot when shopping for eyeglasses online. Here are some benefits of accurate PD measurement for online glasses shopping:

• Proper fit for visual clarity: When your lenses are aligned with your pupils, you are looking through the most optimal part of the lenses for clear vision. Accurate PD measurement ensures that you are receiving the correct prescription and experiencing optimal visual clarity.
• Convenience: Ordering eyeglasses online offers convenience and saves time. Thus, you can confidently order your glasses from the comfort of your own home without the need for in-person adjustments.
• Cost savings: Ordering glasses online often comes with cost savings compared to traditional brick-and-mortar stores. With an accurate PD, you can avoid the need for costly adjustments or returns due to ill-fitting glasses.

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When customers need to measure their PD at home, there are several methods available. While a professional measurement is always recommended, especially for complex vision needs, an integrated solution directly on your website is the most reliable and convenient at-home option. It delivers an accurate result without requiring customers to download an app or leave your website.

Other options are: 

• Using a ruler
• Using app on their phone

Online (via an integrated solution on your website)

Fittingbox's PD Measurement is an online tool that delivers an accurate PD result. It guides customers through a step-by-step protocol to ensure exact calculations. They only need to grab a card to start the measurement process.

For retailers, an integrated solution is the most reliable and convenient option: customers can measure their PD directly on your website, without downloading an app or leaving the purchase journey. As the measurement takes place on your website, where your privacy policy applies, customers also have reassurance that their prescription data remains private.

Using a ruler

Customers who prefer a hands-on approach can use a millimeter ruler to measure their PD.

With the ruler in hand, they should stand in front of a mirror and close one eye. They should align the ruler's zero mark with the center of their open eye's pupil. Then, using the ruler, they measure the distance from the center of their open eye's pupil to the center of their closed eye's pupil. Repeating this process a few times helps accuracy and allows them to record the measurements.

Incorrect alignment or inconsistent measurements are common mistakes when using a ruler.

Common mistakes to avoid when using a ruler

• Incorrect alignment: The ruler should be aligned properly with the center of the pupil and held straight to avoid skewing the measurement.
• Inconsistent measurements: Customers should take multiple measurements and calculate the average for the most precise result.
• Improper lighting: Adequate lighting is essential. Insufficient lighting can lead to inaccuracies in the measurement.

Via a mobile app

There are various phone-based solutions available that use the device's camera to measure PD.

Customers can follow the on-screen instructions and allow the app to capture their PD measurement. It is important to follow the app's instructions closely and ensure that the device is held at the correct distance from the face for accurate results.

Incorrect device positioning is a common mistake when using a phone to measure PD. Customers should position the device at the correct distance from their face and follow the solution's instructions closely.

For retailers, asking customers to leave your website and download an app before completing their order adds unnecessary friction to the journey.