Zeiss AT 030, Product Documentation Set

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Instruction for use 5 Daily startup
AT 030 5.4 Preparing for measurement
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NOTE! Always anesthetize both eyes to avoid eyelid blinking.
NOTE! The application of too much fluorescein solution
results in readings that are too high, whereas too little
fluorescein solution results in narrow semicircles, thus
producing readings that are too low.
Action
u
Calm the patient to take away his/her fear of the examination
as this fear may cause an increased intraocular pressure.
Therefore, do not use the result of the first trial measurement
on both eyes, but take the average of the subsequent three
measurements of each eye to obtain a reproducible result.
u
Administer usual anesthesia of the cornea of the patient’s eye
prior to measurement.
u
Then apply a drop of fluorescein solution to the conjunctival
sac of the patient’s eye, using a strip of blotting paper as
necessary, to produce a green fluorescing band of liquid
around the measuring surface in the following measurement.
u
Ask the patient to look towards the front surface of the
measuring prism. If necessary, the fixation lamp can be used to
calm the eyes.
u
Record the date and time of each tonometer measurement and
the period that has passed since the last application of
pressure-reducing substances.