Canon TX-20 Full Auto Tonometer - Manual (Page 43)

4BasicOperation
43
4) Move the operation lever to check the following:
• Pull the operation lever slightly backward so the nozzle stop position mark disappears.
• Tilt the operation lever forward and the nozzle stop position mark appears. The nozzle should
not approach the eye being examined closer than the stop position.
Pull backward Press forward
9
Have the patient stare at the eye fixation lamp.
Have the patient stare at the green internal eye fixation lamp inside the nozzle.
Press the eye fixation lamp key to switch to the external eye fixation lamp if the patient cannot see
the internal eye fixation lamp, if it is difficult to see, or if the patient's line of sight is unsteady.
External eye
fixation lamp
Measuring
This section explains the full auto-alignment mode, which is most often used for normal measuring.
The number of measurements is assumed to be set at three.
Togetahighlyreliablemeasurement
We recommend that the number of measurements be set to three in full auto-alignment mode.
We also recommend to perform more than three measurements in the auto- or manual-alignment
mode to get a stable measured values.
L-IE-5191C_TX-20.indb 43 2013/07/18 13:10:27