How to Find Your PD for a Zenni Optical Order (No Eye Exam Required)

If you've gotten partway through a Zenni Optical order and hit a field asking for your PD, here's the short version: Zenni requires a pupillary distance for any order that includes a prescription, and the only exception is non-prescription glasses or plain readers. This guide covers what Zenni specifically accepts and how to get your number — for the fundamentals of what PD is, our complete guide to measuring pupillary distance has the full background.

What Zenni accepts at checkout

Zenni takes your PD in either of the two standard formats, so whichever one you have works:

• Single (binocular) PD — one number, the total distance between your pupils.
• Dual (monocular) PD — two numbers, written like 32/30, right eye first.

If you're ordering reading glasses, Zenni uses your near PD, which is about 3 mm less than your distance PD (or 1.5 mm less per eye on a dual PD). We explain that conversion in near PD for reading glasses, and the difference between the two formats in single PD vs dual PD.

Where to get your number

Roughly in order of how official they are:

1. Your last prescription — PD isn't always printed, since it's technically not part of the refraction, but many optometrists include it if you ask.
2. Call your eye doctor's office — if you had a recent exam, they likely have it on file.
3. Measure it yourself — where most people ordering online end up. Our PD measurement tool uses your camera and the iris as a built-in size reference — no ruler or card — and returns both the single and dual numbers, ready to paste into Zenni's field.

What happens if your Zenni PD is wrong

This is the part worth knowing before you order, because Zenni draws a specific line. If Zenni's lab made the glasses incorrectly, they remake them free. But if the PD you entered was wrong, Zenni treats that as a customer error — historically a partial refund, now generally store credit rather than cash. In other words, a mistyped PD is on you, not the lab.

We compare how Zenni, Warby Parker, GlassesUSA and EyeBuyDirect each handle a wrong PD — and how to prove whose mistake it was — in what each store does if your PD is wrong. It's worth two minutes before you commit, especially on a strong or progressive prescription where a small PD error matters more (see does your PD need to be exact).

The honest bottom line

Camera-based measurement at home is a solid estimate, and it's the same basic idea Zenni's own PD tool uses. For an ordinary single-vision order, a careful reading is plenty. For a strong prescription, progressives, or a child's glasses, take a couple of readings, confirm they agree, and ideally check against a real exam — because with Zenni, a wrong PD costs you, not them.

Sources

• Zenni Optical — Measuring Pupillary Distance (PD)
• Zenni Optical Help Center — PD: Pupillary Distance
• Zenni Optical — Return Policy Terms