Handheld Tonometers
A handheld tonometer measures intraocular pressure (IOP) at the point of care, and that single reading is the foundation of glaucoma screening and monitoring. Unlike a chair-mounted slit-lamp tonometer, a portable handheld unit goes to the patient instead of the other way around: the exam lane, the OR, a hospital bed, a wheelchair, a satellite clinic, or a mobile and domiciliary visit. For ODs, MDs, and practice or lab owners building an efficient IOP workflow, the handheld form factor delivers reliable pressure measurement without tying it to one fixed instrument.
US Ophthalmic supplies handheld tonometers to eye care practices, hospitals, and labs across the US, backed by our in-house technical and repair department, genuine spare parts, and US-based warranty and service. Whether you are standardizing on the applanation reference method or adding a portable backup unit, our team helps you match the device, its consumables, and its service plan to how your practice actually measures pressure. Request a quote and we will confirm current configurations, availability, and certified pre-owned options.
How to choose a handheld tonometer
- Measurement principle: Goldmann-prism applanation is the long-standing reference method for IOP and is what the Kowa HA-2 uses; rebound and electronic pen-style devices trade some of that reference status for speed and drop-free comfort. Decide which principle fits your clinical protocol before comparing individual units.
- Position independence and portability: For bedside, surgical, wheelchair, pediatric, or domiciliary measurement, choose a unit that reads accurately in any orientation. The Kowa HA-2's internal spring mechanism, built-in illumination, and single-hand operation are designed for exactly these off-lane scenarios.
- Readout and staff workflow: A direct-reading dial, as on the HA-2, shows pressure without conversion tables and speeds delegation to technicians; digital readouts add averaging and logging. Match the interface to who takes the measurement and how it gets recorded.
- Consumables and infection control: Applanation requires topical anesthetic and fluorescein, and the prism must be disinfected between patients; probe-based rebound devices instead use single-use tips. Factor per-patient consumable cost and your sterilization workflow into the total cost of ownership.
- Service, calibration, and warranty: A handheld tonometer is a precision instrument that needs periodic checking and occasional repair. Buying from a provider with an in-house service department, genuine spare parts, and a US warranty keeps the device accurate and minimizes downtime.
- New vs. certified pre-owned: Refurbished handheld tonometers can lower entry cost or fund a second backup unit; the key is that each device is properly inspected, calibrated, and warrantied. We can quote both new and certified pre-owned when available.
Comparing handheld tonometry approaches
The handheld tonometer we carry is the Kowa HA-2, a portable Goldmann-applanation unit. The table below compares the main handheld measurement approaches so you can confirm the HA-2 fits your protocol and patient mix.
| Model / approach | Measurement type | Best for |
|---|---|---|
| Kowa HA-2 | Handheld Goldmann applanation | Practices wanting the applanation reference method in a portable, position-independent unit |
| Pen-style applanation | Electronic applanation tip | A compact digital readout for bedside checks and irregular-cornea cases |
| Rebound | Light disposable probe, no anesthetic drop | Fast, drop-free screening for pediatric or anxious patients |
Frequently asked questions
What is a handheld tonometer and how does it work? A handheld tonometer is a portable instrument that measures intraocular pressure (IOP), the pressure inside the eye, at the point of care. Depending on the device it uses applanation, gently flattening a small area of the cornea, which is the method used by the Kowa HA-2, or rebound, a light probe that briefly touches the cornea. IOP is the key measurement for detecting and monitoring glaucoma.
Is applanation or rebound more accurate? Goldmann applanation is the long-recognized reference standard for IOP, which is why applanation devices like the Kowa HA-2 remain widely trusted for clinical measurement. Rebound tonometry is valued for speed and patient comfort and correlates well in many settings. The right choice depends on your protocol, your patient mix, and whether you want a drop-free workflow.
Does the Kowa HA-2 require anesthetic drops? Yes. Because it uses Goldmann-prism applanation, the HA-2 requires topical anesthetic and fluorescein, the same preparation used with standard applanation tonometry. Rebound handheld tonometers, by contrast, are typically used without anesthetic.
Can a handheld tonometer be used with the patient lying down or in a wheelchair? Yes, and that portability is the main reason to choose a handheld unit. The Kowa HA-2's internal spring mechanism is designed to give accurate readings regardless of patient position, making it well suited to bedside, surgical, wheelchair-bound, pediatric, and mobile or domiciliary exams.
Do you offer new and refurbished handheld tonometers, and are they serviced? We can quote new units and, when available, certified pre-owned handheld tonometers. Every device we supply is backed by our in-house technical and repair department, genuine spare parts, and US-based warranty and service, so your instrument stays calibrated and supported. Request a quote for current pricing and availability.
