Keeler Applanation Tonometer

The Goldman principle is considered to be the most prevalent method of Tonometer as it is the most widely accepted method of estimating intraocular pressure. The Keeler Applanation Tonometer (KAT) are designed and built to our exacting standards to give you the accuracy and quality you expect from a Keeler manufactured device.
Goldmann Applanation principle
The Goldmann applanation principle is widely acclaimed as the most common and direct method of assessing IOP.The KAT® is made with precision machined components, subject to stringent quality controls pre, during and after assembly to add reliability and repeatability to an established technique.
T type, R type or BQ type 
The take-away T type KAT is fitted to the guide plate on the optical axis for the microscope and illumination unit arm. The fixed R type is mounted on a post fitted to the microscope optical body. The BQ KAT® is designed specifically to fit the Haag Streit BQ, BP and BX Slit Lamps and fits directly to the optics support arm.