Icare ic100 Instruction Manual - page 7
Icare ic100 tonometer manual
ENGLISH
www.icaretonometer.com
7
STEP 5.
Following the performance of the entire measurement, a new measurement series can be begun by pressing the Measure button. The tonometer will
then reactivate the probe and be ready for the next measurement series with the Play symbol on the display. The measurement sequence can be aborted by
pressing the Select button.
STEP 3.
You may perform the measurement in single or series mode.
Single mode: Press the Measure button lightly to perform the measurement, taking care not to shake the tonometer. The tip of the probe
should make contact with the central cornea. Six measurements should be made consecutively, blue segments will be lit after every
successful measurement. After each successful measurement, you will hear a short beep.
Series mode: Keep the Measure button down to obtain the sequence of six measurements, blue segments will be lit after every succesful
measurement.
To obtain the most accurate reading, six measurements are required. The measurement values displayed before the final result are average values for all previous
measurements (1.-5.). Single measurement values are not shown.
If there is an erroneous measurement, the tonometer will beep twice and display an error message. Press the Measure button to clear the
error message. If several erroneous measurements appear, see error messages.
STEP 4.
Once the six measurements have been performed, you will hear a long beeb. The final IOP will be shown on the display rounded by green (perfect) or yellow
(some variation) segments. If variation is too big, Repeat will be displayed.
The displayed result is an average of four measurements as the highest and the lowest
reading are discarded before the average calculation.
The colors green and yellow as well as repeat indication are related to to the standard
deviation (SD) of the of the four remaining measurements.
The equivalence between the displayed color/repeat indication and SD is following:
Green -> SD less or equal to 2.5
Yellow -> SD higher than 2.5 and less or equal to 3.5.
Repeat -> SD higher than 3.5.
Repeat is also displayed for SD higher than 2.5 and less or equal to 3.5 if the IOP result is higher than 19.
If the user doubts the validity of the measurement (for example, if the probe made contact with the eyelid, or missed the central cornea etc.), we recommend
that he/she makes a new measurement. In addition, when encountering unusual values (for example over 22mmHg or below 8 mmHg) we recommend taking of
a new measurement to verify the result.
*Badouin C, Gastaud P. Influence of topical anesthesia on tonometeric values of intraocular pressure. Ophthalmologica 1994;208:309-313.