PD for Online Glasses Orders (Pupillary Distance)
When you check out at any online glasses store, it will want your PD. A single PD like 63 or a dual PD like 31.5/32, right eye first, is what most shops accept, and plenty of them also provide a way for you to measure it.
Where Do Shops Ask You to Enter PD?
The table collects what the help pages of the shops themselves say about taking a PD measurement and typing it in. The tools at shops change, so each row links to the page that is current.
| Shop | How it helps you find your PD | What the order form takes | Near PD |
|---|---|---|---|
 Warby Parker | A PD tool that runs in your browser (a card placed under your nose and a single photo), and also inside its app (shop page) | Single or dual PD | For reading glasses, take 3 mm away from your single PD |
 Zenni Optical | A digital PD tool that works with a standard card and your computer or phone camera (shop page) | A single PD such as 62 works, or a dual PD like 32/30, entered with the right eye (OD) first | With a prescription like 63/60, the distance PD comes first and the near PD second |
 EyeBuyDirect | A tool found behind the i button in the PD area of the prescription form, along with a PD ruler you can print (shop page) | Single or dual PD | You also need a near PD for progressive and bifocal orders |
 GlassesUSA | A measuring guide, plus PD boxes at checkout and a comment box for numbers that are not in the list (shop page) | A single PD such as 62, or a dual PD like 31.5/32.5, right eye first | Progressives and bifocals get their own Near PD box, and a child's order requires that child's own PD |
 LensCrafters | Guides for measuring by yourself or with a friend, plus the Opthy app (shop page) | A single PD, or a dual value such as 32/30, where the right eye (OD) comes first | Reading glasses are the one exception: they call for a near PD, while every other pair takes a distance PD |
 Specsavers | A guide for buyers on measuring your own PD before ordering online (shop page) | Your measured PD, needed to buy glasses online | Not stated in its guide |
The Warby Parker PD Tool
You can get a PD reading from Warby Parker in your browser or within its app. Place a card under your nose and take a single photo. For reading glasses, the guidance is to take 3 mm off your single PD, or 1.5 mm off each eye's figure (Warby Parker). A PD taken with the camera measurement here can also be entered on its order form.
Zenni PD Measuring Tool and Ruler
A digital PD tool from Zenni Optical works with a standard card and the camera on your phone or computer. You can enter a single PD such as 62 on its form, or a dual PD such as 32/30, listing the right eye (OD) first. When a prescription lists a pair like 63/60, the first figure is the distance PD and the second is the near PD.
EyeBuyDirect and GlassesUSA PD
In the prescription form's PD section, the i button opens EyeBuyDirect's PD tool; a printable ruler is offered as well. It also asks for a near PD when the order is progressive or bifocal.
GlassesUSA provides a measuring guide, plus PD boxes at checkout and a comment box for any value missing from the list. Progressives and bifocals have a separate Near PD box, and when you order for a child you must supply that child's own PD.
LensCrafters and Specsavers PD Measurement
To measure PD, LensCrafters provides its Opthy app as well as guides for doing it alone or with a friend. A dual PD is shown as two numbers, for example 32/30, with the right eye (OD) placed first (LensCrafters). Specsavers in the UK says your PD is needed to buy glasses online, and it offers a guide for measuring it yourself (Specsavers).
Costco, Walmart and Other Store Opticals
If you get glasses made at a store optical such as Costco Optical, Walmart Vision Center or Visionworks, the optician measures your PD, so you rarely enter it yourself. If you are buying from another seller, request the PD along with your prescription. After the exam, US eye doctors must give you the prescription, and some states require the PD to appear on it (FTC Eyeglass Rule).
No PD? Measure It Before You Order
A shop's app is not required. Use a bank card plus your camera to measure your PD, then put the number in whatever order form you use. Guessing from an average PD is weaker than using your own number.