Tonosafe is developed, manufactured, and supported by Haag-Streit, so quality, accuracy and reliability are assured. Calibrated to Goldmann standards, Tonosafe has been specifically designed for use with Goldmann and Perkins style tonometers.

Tonsafe disposable prisms are available to buy from the Haag-Streit UK eshop, boxed in 100s with five prism holders per box.

Tonosafe avoids the need for time consuming and laborious cleaning and disinfection, without compromising the original Goldmann quality. It has been developed for single patient use only, and thus reliably eliminates the risk of cross infection, even in the most difficult situations.

Sold worldwide for over twenty years, Tonosafe disposable prisms are now recognized as the leading method of reducing the risk of cross infection during tonometry.

A number of peer-reviewed clinical investigations have validated Tonosafe compared to the Haag-Streit Goldmann tonometer prism, finding it to be cost-effective and provide consistently reliable results across a range of Intra-Ocular Pressures (IOP).

Precision engineered to meticulous standards, Tonosafe provides a superb view of the fluorescent tonometer mires to ensure the highest optical clarity; synonymous with Haag-Streit’s tonometry heritage. 

Everything you need is supplied in one box, including prism holders. Boxed in 100s, Tonosafe is supplied in five trays of 20 prisms (plus one prism holder). The combined weight of prism and holder is 1.65g +/- 0.05g, so no conversion of results is required.

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.