Safe Eliminates the risk of cross infection between patients and protects them from cross infection of diseases transmitted via the tear film Ease of use Removes the need for sterilisation of prisms prior to each procedure. Tonomate prisms are individually sterile packed allowing for fitting without direct contact with the prism Type: Disposable, sterile, individually packaged Fitting: Fits most common Applanation Tonometer prism holders Length: 30mm Packed: Boxed in 100's Quick Overview Precision made Goldmann type Disposable Applanation Prisms. Sold in boxes of 100 individually packaged prisms.