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How to Measure Pupillary Distance

What Is Pupillary Distance?

 

Pupillary Distance (PD) is the distance between your pupils - as simple as that. Ascertaining pupillary distance is typically done by your eye doctor or specialist, as the measurement is crucial in fitting your glasses to your eyes. You may be familiar with the concept; your optician should provide your pupillary distance after an eye exam.

 

It's worth noting that the distance between the optical centres of your lenses should be the same as your pupillary distance in order for proper vision correction to take place. 

 

However, in case it isn’t given to you, our following guide will show you how to find the pupillary distance. When measuring the pupillary distance, you can either do it online, by yourself with a mirror, ask a friend for assistance, or use our Lens Scanner App that gives you an accurate reading of your current prescription and pupillary distance.

 

Measure your Pupillary Distance Online

 

The best option of measuring your PD is by using our free online tool. We recommend this way as it’s fast, easy, and accurate. All you need for our online tool is a smartphone or a webcam and a card with a magnetic strip. The tool comes with voice instructions that will guide you through 4 easy and quick steps.


Find your PD now using our free and easy online tool here!

 

How to Find Your Pupillary Distance With Assistance

 

Please note that for this test, you'll need a ruler, another human and a pair of eyes.

Step 1 – Hold the pupillary distance ruler up to the bridge of your nose. Your pupillary distance ruler can be any millimetre ruler.

Step 2 – Have a friend stand roughly an arm’s length away from you.

Step 3 – Close your right eye and ensure the pupillary distance ruler’s zero is aligned with your left pupil. Make sure your accomplice is paying attention, as you'll need them for this part. 

Step 4 – Keep the pupillary distance ruler still. Look straight ahead, close your left eye and open your right eye.

Step 5 – Have your friend read the number that's aligned with the centre of your right pupil. This number is your pupillary distance.

Step 6 – Use the scientific method: Repeat the process to ensure the most accurate result. 

 

Here are a few tips that you can use when someone is helping you measure your pupillary distance:

- Have them crouch/sit while you stand so they are out of your field of vision.

- Keep your eyes as still as possible.

- Look above their head at something approximately 10-20 feet away.

 

How to Find Your Pupillary Distance by Yourself

 

Please note that for this test, you'll just need a ruler and a mirror. Nice and easy.

Step 1 – Hold the pupillary distance ruler up to the bridge of your nose. Your pupillary distance ruler can be any millimetre ruler.

Step 2 – Face a mirror.

Step 3 – Close your right eye. Whilst looking in the mirror, Ensure the pupillary distance ruler’s zero is aligned with your left pupil.

Step 4 – Keep the pupillary distance ruler still. Look straight ahead, close your left eye and open your right eye.

Step 5 – Read the number that aligned with the centre of your right pupil. This number is your pupillary distance.

Step 6 – Repeat the process to ensure you get the most accurate result.

 

 

What Is the Average Pupillary Distance?

 

The average pupillary distance for most adults lies between 55 and 65mm, while the average pupillary distance for children is usually between 42 and 54mm. However, for some people, pupillary distance can vary outside these typical measurements.

 

Measure Pupillary Distance with our App

 

You can now measure your pupillary distance with Vision Direct’ Lens Scanner, available on the App Store and Google Play. This app will help you save time and money when buying a new pair of glasses.

The application allows you to get your current prescription details free of charge within minutes without having to go to an eye doctor. The Lens Scanner is also a pupillary distance measurement app, so you will get all the details you need to buy a new pair of prescription eyeglasses.

 

 

 

Here are a few benefits of using the Lens Scanner app to measure pupillary distance online:

 

- The application is totally free.

- It's fast and hassle-free as you can get it done in only 5 to 10 minutes.

- You can get your own prescription anywhere and at any time.

- It's an FDA listed application.

- You can immediately start shopping for a new pair at VisionDirect!

 

How to Measure PD Using the Lens Scanner App

To find your pupillary distance using the Vision Direct Lens Scanner app, all you need is a smartphone with a functional camera, a magnetic card, and a computer (desktop or laptop) with a 12” screen or larger. Download the app and follow these three easy steps:

  1. Scan Your Lenses – Sync the app with your computer and follow a few easy steps to scan your lenses. It's simple-to-use and laid out with you in mind, but if you have any queries, don't hesitate to email us here.
  2. Get Your Prescription and Pupillary Distance – You'll get your accurate prescription details completely free of charge. Hold a magnetic card on your forehead above your eyebrows and snap a selfie so our Lens Scanner can measure your PD. 
  3. Buy Prescription Eyewear – Shop our extensive collection of designer eyewear with a 2-year warranty, FREE shipping, 100-day returns, and best price guarantee.

 

 

 

 

 

Prescription measurements are highly accurate and in line with the standard range of deviation as in any doctor’s office. Retrieved prescription details within a range of +/- 0.25 diopters which is the industry standard. Pupillary distance measurement is proven accurate within a +/- 1 mm.

 

I’ve Got My PD. What’s Next?

 

Once you’ve got your pupillary distance, you’re in for a treat. At Vision Direct, there’s a whole world of designer sunglassesdesigner eyeglasses and more available from the comfort of your home. You’ve got a key part of your prescription to hand, meaning you’ll be far more informed when it comes to buying eyewear online.

 

Speaking of being more informed, check out our Optical Centre. We’ve got hundreds of articles, ranging from contact lens queries to eye health answers - all at your fingertips. We also follow up our customers’ burning questions with our Ask the Optician section. Here, you’ll find expert-led advice about a range of topics from our in-house optician team.

 

Read up on the facts? Good. It’s time to pick up some unreal deals from Vision Direct. We thought we’d introduce you to a couple of our favourite ranges below.

 

Arise HD Prescription Lenses

 

Vision Direct offers groundbreaking durability, pristine clarity and perfect vision - all in the same lenses. Arise HD Clarity Prescription Lenses are made for the everyday wearer, but also offer advanced protection making them suitable for any adventure.

 

The Arise Clarity Lens Collection comes packed with protective elements to provide you with an unbeatable pair of prescription glasses. From scratch-resistant and anti-reflective coatings to UV 400 and superhydrophobic protection, these lenses are guaranteed to keep your eyes comfortable in any situation. 

 

These lenses are also aspheric, making them thinner and lighter than many other prescription lenses. These high performing, durable lenses feature an innovative lens technology that provides optimal clarity and comfort in the urban jungle.

 

Simply choose any frames you like, enter your prescription and select Arise Collective for your lens type. Let's get started!

 

zFORT® Blue Light Blocking Glasses

 

Blue light is a potentially harmful form of light. While it is naturally emitted by the sun, electronic devices (upon which we’re spending more and more time every day) are also high-level producers. Blue light rays at a wavelength between 415nm - 455nm can damage your retinal cells, which may lead to premature eye ageing and vision problems in the future.

 

Our exposure to these harmful light rays may also cause a range of other health problems, including poor sleep (according to a 2012 Harvard Medical School study). Find out more about how to protect your eyes from blue light with anti-blue light glasses from zFORT®.

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