You need a reliable IOP reading in a room without a slit lamp — a nursing home visit, a pediatric chair, a post-op check on a patient who can’t sit at the table. That’s the exact job the Tono-Pen XL was built for, and it’s why a refurbished one is one of the most cost-effective instruments you can add to a practice. The catch: not every “refurbished” handheld you’ll see listed has actually been serviced. Here’s how to tell before you pay.
First question: Medtronic or Reichert?
The Tono-Pen XL was originally a Medtronic Solan product; Reichert later acquired the line and continued it. Clinically they measure the same way — a strain-gauge applanation tip that averages several readings and gives you an IOP with a statistical confidence bar. If you’re buying refurbished, the practical difference is parts availability and what tip covers fit. Reichert still supports the line directly, so a Reichert Tono-Pen XL is the safer bet for long-term consumables. A Medtronic Tono-Pen XL reads identically and costs less — fine if you confirm the seller includes calibration and a supply of Ocu-Film tip covers.
Both use the same disposable latex-free tip covers, so covers are not a reason to pick one over the other. Warranty and calibration history are.
The four things a real refurb should have passed
Applanation electronics drift and battery contacts corrode. “Refurbished” should mean each of these was actually checked — ask the seller to confirm all four in writing.
Calibration verified, not just “powers on”
The XL self-checks at startup, but that only confirms the electronics wake up — it does not confirm the strain gauge reads true. A serviced unit should have been calibration-verified against a reference. If the listing only says “tested working,” that’s a power-on test, not a calibration.
Battery door and contacts intact
The single most common failure on a used Tono-Pen is a corroded or cracked AA battery compartment from a leaked cell left in storage. It’s cheap to overlook and annoying to fix. Ask for a photo of the open battery door.
Tip and transducer free of debris
The measuring tip is a fine transducer. Dried fluorescein or a torn cover left on during storage can throw readings. A proper refurb cleans and function-checks the tip with a fresh cover installed.
A case and a starter supply of covers
The covers are consumable and required for every reading. A unit that ships with its case and a starter box saves you from a same-day reorder before you can use it.
Where a handheld actually fits
A solo OD who takes IOP at the slit lamp all day does not need a handheld as a primary instrument. Where the XL earns its keep is anywhere the patient can’t come to the lamp: home and long-term-care visits, wheelchair-bound patients, children, and screening events. It’s also the backup that keeps a clinic running when the main tonometer is out for service. If your caseload includes veterinary work, the same platform ships as a Tono-Pen VET with a species-specific reading mode.
One more option worth knowing: the Reichert Avia Tono-Pen is the newer generation of the same handheld concept, with a quick-tap workflow and a larger display. If you want the mobility of a Tono-Pen but a more current unit, price the Avia against a refurbished XL before deciding.
Red flags in a used listing
Skip any listing that won’t answer a direct calibration question, shows no battery-compartment photo, or bundles no tip covers and no case. “As-is, untested” handhelds are a gamble — the electronics either read true or they don’t, and you can’t tell from a stock photo. Buy from a seller who inspects the unit and stands behind it.
Currently in stock: Tono-Pen XL Medtronic, Tono-Pen XL Reichert, Reichert Avia Tono-Pen, and Tono-Pen VET.
Every refurbished Tono-Pen we sell is inspected and calibration-checked by a technician before it ships, comes with its case, and includes a warranty — not an “as-is” gamble.
Tell us where you’re taking readings — bedside, pediatric, veterinary, or as a clinic backup — and we’ll point you to the right unit and confirm what’s in the box. Call 305-771-4562 or contact us here, or browse our full tonometer inventory.
