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1. Introduction
Thank you for choosing this Keeler Applanation Tonometer (KAT).
Please read this manual carefully before using your KAT.
This will ensure the safety of the patient and your confidence
in the measurements it provides. This manual should be stored
safely for future use.
1.1 Brief description of the instrument
The Keeler Applanation Tonometer operates according to the
“Goldmann method”, by measuring intraocular pressure from the
force required to flatten (applanate) a constant area (3.06mm) of
the cornea. A special disinfected (or single use) prism is mounted
on the Tonometer head and then placed against the cornea.
The examiner, using a slit lamp biomicroscope at 10x
magnification, with a blue filter views two fluorescing green
semi circles. The force applied to the Tonometer head is then
adjusted using the dial until the inner edges of these green
semi-circles meet.
Because physical contact with the cornea takes place it is
necessary to apply to the patients cornea a suitable topical
anaesthetic.
1.2 Intended use /
purpose of instrument
The Keeler Applanation Tonometer is
indicated for measuring intraocular pressure to
aid in the screening and diagnosis of glaucoma.
The Keeler Applanation Tonometer (KAT) is
an accessory item for most ‘Tower Illumination’
type of Slit Lamps and thanks to its versatility,
the KAT Tonometer can be mounted on
and used with slit lamps produced by
many manufacturers.
The KAT should be used only by trained personnel. USA Federal
law restricts this device to sale by or order of a physician.
The manufacturer declines any and all responsibility and warranty
coverage should the instrument be tampered with in any manner
or should routine maintenance be omitted or performed in
manners not in accordance with these manufacturer’s instructions.
R type (fixed) KAT on Slit Lamp
