The Tonosafe disposable prisms are a convenient, effective method of reducing the risk of cross infection between patients and eliminating the need to clean and disinfect prisms. Tonosafe are compatible with both Goldmann and Perkins tonometers. Simple to use Completely safe - developed for single use. Eliminates the risk of cross infection Convenient and cost effective - avoids the need for disinfection and sterilisation Accurate - calibrated to Goldmann standards