Goldmann applanation tonometry has been the gold standard in tonometry for many decades. It is based on the Goldmann principle—tried and tested during more than 50 years of usage with millions of patients.

The device is mounted permanently on the microscope arm. It provides a parking position and can be easily placed into working position. The measurement is obtained through the right eyepiece.

Our device fits the Haag-Streit BI 900 and BM 900 slit lamps, as well as many third party models. Mounted on top of the microscope, it can be left on the slit lamp permanently as it provides a parking position and can be easily swiveled into working position. The measurement is obtained through the right eyepiece.

Mounted on a guiding platform placed over the slit lamp axis: the tonometer is placed on the slit lamp only when applanation tonometry is performed. The instrument can be moved between two positions for observation through the right or left eyepiece.

The AT 870 is mounted permanently on top of the slit lamp microscope. The feeler arm protrudes from above into the beam path of the microscope and illumination unit.  If the feeler arm is swivelled into the park position, the slit lamp can be used immediately for the examination. The applanated surface is observed monocularly through the left eyepiece of the stereo microscope.

Our sustainable Goldmann measuring prisms are reusable and are characterized by their excellent optical and mechanical performance, enabling fast and reliable IOP measurement in daily practice. The prisms are produced in Switzerland with manufacturing standards of the highest level.

Tonosafe is a Haag-Streit UK single-use tonometer prism and avoids the need for time-consuming and laborious cleaning. It effectively reduces the risk of cross infection, even in the most demanding scenarios. Calibrated to Goldmann standards, Tonosafe delivers accurate results with all Goldmann tonometers. 

At Haag-Streit UK, we are always happy to support our customers with any queries on our range of products. As a first port of call, we have put together a comprehensive list of tonometry frequently asked questions.  

HS-UK is the only UK service provider that uses genuine Haag-Streit tonometer parts and test jigs calibrated to Haag-Streit standards, as it is the only Haag-Streit authorised applanation tonometer service agent in the country. You can rest assured we use state-of-the-art testing and calibration equipment and genuine parts and materials, all manufacturer-supplied. At our purpose-built, fully-equipped workshop facility, your tonometer will be fully-inspected, its worn or broken parts replaced, including cone arms and bearings, and its calibration will be checked, all before it is thoroughly decontaminated and returned to your clinic.