Tonometry

Gold standard for over 65 years

Tonometry

Since their introduction in 1957, Haag-Streit tonometers have been the gold standard for fast and reproducible IOP measurements. We offer an optimally designed tonometer solution for all slit lamps, guaranteeing seamless integration into the examination workflow.

Applanation Tonometer 900 & 870

Tonometry Accurate & reproducible IOP measurements

Tonosafe

Tonometry Reduce the risk of cross infection

Compare our products

	AT 900 model BQ / BP	AT 900 model R	AT 900 model T	AT 870
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	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	0.85 kg / 1.87 lbs
Width	≤0.49 mN	≤0.49 mN	≤0.49 mN	≤0.49 mN
Working temperature	10° to 35° C / 50°F to 95°F	10° to 35° C / 50°F to 95°F	10° to 35° C / 50°F to 95°F	10° to 35° C / 50°F to 95°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	contact your local distributor
Tonometer prisms
Goldmann tonometer prisms	●	●	●	●
Tonosafe	○	○	○	○

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

Goldmann applanation tonometer

The gold standard to this day

Professor Goldmann's research into glaucoma led to the development of the first device for measuring intraocular pressure: the Applanation Tonometer 870. Together with Haag-Streit, it was launched in 1957, followed by the AT 900 in 1958. It has remained the gold standard ever since.

Numerous satisfied customers and patients

Durable performance

Thanks to Haag-Streit's high manufacturing precision, our tonometers provide many years of reliable performance without the need for manufacturer maintenance. Since 1957, we have sold over 100,000 tonometers, ensuring optimum diagnosis for millions of patients.

Clinically proven

Tried and tested for over 65 years

The Goldmann applanation tonometer has been tried and tested for over 65 years. Since then, over 900* studies have been published, proving the reproducibility and accuracy of the instrument.

*Based on a PubMed search, May 16, 2023. Based on Keyword “Goldmann” and “applanation tonometer.”