Can You Order Glasses Without Your PD?

You are ready to order glasses online, you have your prescription in hand, and then the form asks for your pupillary distance (PD) — a number that is nowhere on your prescription. It is a frustrating spot to be stuck in. The good news is that you have several ways forward, and none of them requires giving up on ordering online. This article lays out your options.

If you are new to the topic, our complete guide to measuring pupillary distance explains what PD is and why it is needed.

Why your PD is often missing

First, it helps to know that this is normal and not an oversight you imagined. PD is not technically part of your refraction — the part of the eye exam that determines your lens powers — so it is not always recorded on a standard prescription. Some clinics include it, many do not. The numbers printed on the inside of your current frames are the frame's measurements, not your PD, so you cannot read it off there either.

So if your prescription has no PD, you are in the same position as most people ordering glasses online. Here are your options.

Option 1: Ask whoever did your eye exam

The most direct route is to ask the clinic or optician where you had your exam. They often measure PD as part of fitting glasses, even if they did not print it, so they may have it on record. A quick phone call or email is sometimes all it takes.

It is worth knowing that practices vary in whether they readily provide PD, since they also sell glasses themselves. Still, many will give it to you if you ask, and it never hurts to start here.

Option 2: Measure it yourself

You do not actually need anyone else to get a usable PD — you can measure it at home. For ordinary single-vision glasses, a careful self-measurement is generally accurate enough, and there are a few reliable ways to do it.

The classic method uses a millimeter ruler and a mirror. There are also card-based methods that use a standard card as a size reference, and camera-based tools that detect your pupils automatically. Each has its strengths, and our guide to measuring PD walks through all of them step by step, along with the technique tips that make the result reliable.

The key with any self-measurement is to measure several times and make sure you get a consistent number in the normal range. If you are curious whether your number is typical, see what is the average pupillary distance.

Option 3: Use a previous record

If you have ordered glasses before, your PD may be recorded in that order — many online retailers save it to your account, and some opticians note it on a receipt or fitting record. Digging up a past order is an easy way to recover the number without measuring again. Just bear in mind that PD can be worth re-checking over time, especially for children, whose PD changes as they grow.

How accurate does the number need to be?

This is where many people worry they will get it wrong. For most ordinary prescriptions, a PD within a millimeter or two of your true value is fine, so a careful at-home measurement will serve you well. Precision matters more for strong prescriptions and for progressive lenses, where it is worth taking extra care or confirming with a professional. We explain the tolerances in does pupillary distance need to be exact.

A note on single vs dual PD

When ordering, you may be asked for a single PD (one number) or a dual PD (two numbers, one per eye). For most single-vision orders, a single PD is all you need. If you are unsure which to provide, our explainer on single PD vs dual PD clears up the difference and how to convert between them.

The bottom line

You can absolutely order glasses without a PD printed on your prescription. Ask the clinic that did your exam, measure it yourself at home with a ruler or a camera-based tool, or recover it from a past order. For everyday glasses, a careful self-measurement within a millimeter or two is enough to order with confidence — and for strong or complex prescriptions, a professional measurement gives you extra certainty.

This article is for general informational purposes and is not medical advice. For strong or complex prescriptions, consult an optician or optometrist.