Tonometers

Gold standard for over 65 years

Tonometers

Since its introduction in 1957, Haag-Streit's Goldmann applanation tonometry has been the gold standard in intraocular pressure measurement across ophthalmology and optometry. Applanation Tonometer 900 is an optimally designed solution for every slit lamp, delivering fast, reproducible measurements. Pair with Tonosafe disposable tonometer prisms, to help minimise the risk of cross-infection between patients while delivering measurement accuracy.

Applanation Tonometer 900

Tonometers Accurate & reproducible IOP measurements

Tonosafe

Tonometers Reduce the risk of cross infection

Compare our tonometry products

	AT 900 model BQ	AT 900 model R	AT 900 model T
Measuring principle
Goldmann principle	●	●	●
Measuring force generated
Through leverage weight	●	●	●
Via spring weight	−	−	−
Measurement range
Measurement range	0 – 80 mmHg	0 – 80 mmHg	0 – 80 mmHg
Meridian setting
Meridian setting	●	●	●
Measurement deviation
The measurement deviation in the measuring prism is in the measuring range from 0 – 58.84 mN and amounts to a maximum of ±1.5% and to a minimum of ±0.49 mN of the nominal value.	●	●	●
Working settings
Weight (kg)	0.78 kg / 1.72 lbs	0.73 kg / 1.6 lbs	0.49 kg / 1.08 lbs
Width	≤0.49 mN	≤0.49 mN	≤0.49 mN
Working temperature	10° to 40° C / 50°F to 104°F	10° to 40° C / 50°F to 104°F	10° to 40° C / 50°F to 104°F
Tonometer fixation
BQ 900	●	−	●
BP 900	●	−	●
BI 900	−	●	●
BM 900	−	●	●
BX 900	●	−	−
Third party slit lamps	contact your local distributor	contact your local distributor	contact your local distributor
Tonometer prisms
Goldmann tonometer prisms	●	●	●
Tonosafe	○	○	○

● standard | ○ optional | − not available | □ not recommended

Applanation Tonometer 900

The gold standard in IOP measurement

Clinically proven and trusted by ophthalmology and optometry professionals for more than 65 years, the Goldmann Applanation Tonometer 900 (AT 900) remains the gold standard for measuring intraocular pressure in glaucoma diagnosis. Used with Goldmann measuring tonometer prisms, it delivers reliable optical and mechanical performance for fast, accurate measurements in everyday clinical practice. Available in a range of models, the AT 900 is compatible with both sustainable reusable prisms and convenient single-use Tonosafe prisms.

Tonosafe disposable tonometer prisms

Convenient. Safe. Accurate.

Tonosafe avoids the need for time-consuming cleaning and disinfection without compromising the original Goldmann quality. Developed for single use, it reliably eliminates the risk of cross-infection in all ophthalmic and optometry clinical settings. Calibrated to Goldmann standards, Tonosafe delivers accurate IOP results with both Goldmann and Perkins contact tonometers during glaucoma testing.