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3
1. Introduction
Thank you for choosing this Keeler Digital Applanation Tonometer
(D-KAT).
Please read this manual carefully before using your D-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
semicircles. The force applied to the Tonometer head is then
adjusted using the dial until the inner edges of these green
semicircles 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 Digital Applanation Tonometer is indicated for
measuring intraocular pressure to aid in the screening and
diagnosis of glaucoma.
Federal law restricts this instrument to sale by or on
the order of a physician or practitioner.
The Keeler Digital Applanation Tonometer (D-KAT) is an accessory
item for most ‘Zeiss illumination’ type of Slit Lamps and
thanks to its versatility, the D-KAT Tonometer can be mounted on
and used with slit lamps produced by many manufacturers.
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.
