The Rexxam Mod-T Applanation Tonometer operates according to the 'Goldmann method', by measuring intraocular pressure from the force required to flatten (applanate) a constant area of the cornea.
​
The T-Type model, which fits most slit lamps and uses applanation prisms,  fixes onto the guide plate on the optical axis for the microscope and illumination unit arm.
 
Please note, the plate mount is sold separately.