Introduction
The iCare-Tonometer is used in the diagnosis, follow up, and screening of
glaucoma.
The iCare is based on the new patented induction based rebound
method, which allows intraocular pressure (IOP) to be measured
accurately, rapidly and without an anaesthetic.
There is no risk of microbiological contamination, as one-use probes
are used in the measurement.
Intraocular pressure changes due to the effects of pulse, breathing,
eye movements, and body position. Because the measurement is made
handheld in fractions of a second, several measurements are needed
to obtain an accurate reading. The software is pre-programmed for six
measurements, but the result can be seen from the first successful
measurement.
Turn to the device and the probe package at
the same time, so that the probe package is
uppermost. Check that the probe has dropped
into the probe base before removing the
package.
The probe in the probe base.
Place the opened disposable package
against the collar component.
Hold the disposable probe in your hand,
open the package, and load the probe into
the sensor base, according to the illustrations.
Forehead support
adjustment wheel
Parts of the tonometer
Display
Selector button
left/right
Grip
Battery
compartment
Collar
Central groove
Forehead support
The device is ready for measurement when
the reading 00 appears in the display.
If the display shows the message LoAd,
there is either no probe in the device, or the
probe is stuck. Check that the probe has not
dropped out, or press the function button
again.
Raise the device to the vertical operating
position, ensuring that the probe cannot fall
out of the probe base. Press the measure-
ment button. The probe will be magnetized
by moving back and forward for a short time,
and the mechanism that prevents the probe
dropping out accidentally will start.
Turning the device ON
and magnetizing the probe
Loading a new
disposable probe
Measurement
button
Measurement
The measurement should be done without anesthetic, because an anesthetic may
reduce the tonometer reading*.
Ask the subject to relax and look straight ahead to a specific point. Bring the
tonometer near to the subject’s eye. The central groove should be in a horizontal
position. The distance from the eye to the front part of the collar is the length of
the collar. The distance should be 4-8 mm from the tip of the probe to the cornea
of the eye. If necessary, adjust the distance by turning the forehead-support
adjustment wheel.
Measure takes place by lightly pressing the measurement button. The tip of the
probe should hit the central cornea. Six measurements are made consecutively.
Press the measurement button carefully, to avoid shaking the tonometer.
After each successful measurement there is a short beep. After the six
measurements, the IOP is shown on the display after the P letter.
If there is an erroneous measurement, the tonometer will beep twice and show
an error message (page 10). Press the measurement button to clear the error
message. If several erroneous measurements appear, see the section ”Error
messages” (page 10).
Before
00
After the second
measurement
2.13
After the sixth measurement.
P 13
Display after the measurements:
Other functions
Accessing old
measurement values.
1
2
3
4
5
6
Adjusting the forehead support
After the sixth measurement, the letter P appears in the display, followed by the
IOP (Intraocular pressure) reading.
If the P is blinking, it means that the standard deviation of the measurements is
greater than normal.
P_ (line down) The standard deviation of different measurements is slightly bigger
value than normally, but the effect to the result is not likely to be relevant.
P_ (line in the middle) The standard deviation of different measurements is clearly
greater than normal, but the effect on the result is usually not relevant. A new
measurement is recommended if the IOP is more than 19 mmHg.
P
_
(line up) The standard deviation of different measurements is great and a new
measurement is recommended.
*Badouin C, Gastaud P. Influence of topical anesthesia on tonometeric values of
intraocular pressure. Ophthalmologica 1994;208:309-313
The forehead support can be adjusted back
and forward by turning the adjustment wheel.
This allows the correct measurement
distance to be set for each individual.
Contents
Starting position.
Press the right or left selector button until
Old appears on the display. Then press the
measurement button. The old values can now
be scanned back and forward by pressing the
selector buttons (right= older, left=recent).
Press the measurement button to exit the old
values search. Old is on the display. Press either
of the selector buttons to access the other
functions (00=measurement, End=turning OFF).
Turning the
tonometer OFF
Press either of the selector buttons until
the display shows End.
Press the measurement button for two
seconds - The display shows ByE and the
tonometer turns off.
The used probe is ejected from the tonometer
Be careful to dispose of the probe properly
(p.7).
The tonometer turns off automatically after
two minutes idle time.
Introduction
1
Parts of the tonometer
2
Loading a new disposable probe
3
Turning the device on and magnetizing the probe
4
Turning the tonometer off
4
Measurement
5
Other
functions
6
Accessing old measurement values
6
Changing the calibration table for different species
6
Safety
instructions
7
Replacing the probe base
8
Replacing the batteries
9
Error
messages
10
Service
10
Technical
information
11
Spare parts and supplies
11
Diagram of tonometer functions
11
Accurate measurement is guaranteed only
when using probes made by Tiolat Oy.
0537
ISO 13485:2003 certified
