Haag Streit USA Tonosafe™ Disposable Tonometer Prisms

Disposable Tonometer Prisms

Tonosafe™ Disposable Tonometer Prisms Eliminate Cross-Infection Risks and Improves Your Efficiency


  • Increased Patient Safety - Developed for single patient use. Tonosafe™ eliminates the risk of cross-infection.
  • Easy to Use - The Tonosafe™ prism and holder combine to have the same mass as the Goldmann prism, so no conversion of results is required.
  • Make You More Efficient - It only takes a moment to position the prism, and the optical clarity provides a superb view of the florescent semi-circles.
  • Extreme Accuracy - Calibrated to Goldmann standards, Tonosafe™ is acceptable for use in all Goldmann and Perkins type tonometers.
  • Reduces Risk of Costly and Stressful Litigation

The Goldmann Applanation Tonometer has become the standard method of testing Intraocular Pressure (IOP). Concern has always been expressed that there is a risk of cross-infection between patients even though it is recommended that prisms are sterilized or disinfected between uses.

The risk became more prominent in the 1990s. It should be noted that there has been no known case of transmission of HIV through tear fluid, but even less serious infections can and do cause problems in ophthalmology departments.

In response to these issues, Clement Clarke has developed a low cost disposable prism, which does not compromise the performance of Goldmann Applanation Tonometers.

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