This unique tonometer utilises micro strain gauge technology and a 1.5 mm contact area. The tonopen is gently tapped on the cornea to obtain four independant measurements. The unit displays the average of the four readings along with a statistical coefficient, on the built-in LCD display. This digitial applanation tonometer functions with the accuracy of the Goldmann standard. It can be used in any position in eyecare clinics, hospitals, emergency rooms and nursing homes by trained personnel. The battery charge lasts for approximately 1200 eyes and sanitised tip covers are used to minimise the risk of cross infection. 

The Tonopen XL Tonometer is used for rapid and accurate Glaucoma screening and can be used over soft contact lenses.  

The battery for the Tonopen has Sussex Vision catalogue number SFS-452-TB.

Sanitised Tip Covers have Sussex Vision catalogue number SFS-452-TC, Pk 150.