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.