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7. Measurement procedure
7.1 Installation on to the Slit Lamp
Before installing the Tonometer on a Slit Lamp ensure that they
are mutually suitable.
7.1.1 Keeler Applanation Tonometer (T type)
• Position the guide plate in the Tonometer/test bar support hole
on the slit lamp.
• Lift Tonometer out of the packaging and assemble it by
inserting the pin on its base into one of the two possible
openings (for right or left eye) on the horizontal guide plate
above the slit lamp axis. These positions are related to the
microscope optics and observation can be made either through
the right or the left eye-piece.
• The Tonometer will slip easily onto the support plate; stability is
assured by the locking pins.
• To obtain an image as clear and as free of reflexes as possible,
the angle between the illumination and the microscope should
be about 60° and the slit diaphragm should be fully opened.
• When not in use the Tonometer should be removed from the
Slit Lamp and placed securely back in the packaging or a
suitable location.
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Guide Plate
