12
VI. OBTAINING PACHYMETRY MEASUREMENTS
The
Pachette 2
does not require a foot switch to obtain pachymetry measurements.
Instead, measurements are automatically taken whenever the tip of the probe is
properly applanated onto the cornea. This feature allows the operator to concentrate on
probe tip alignment and positioning. In addition, the
Pachette 2
was designed (in
Continuous Avg mode) to take multiple measurements very rapidly at a single location
and display the total average. Therefore, as long as the probe is properly applanated
onto the cornea, the unit will continue taking measurements until a predetermined
number of measurements has been reached. This number can be selected by the
operator before beginning the measurement sequence. The following procedure may be
used to obtain pachymetry measurements.
1. Perform the Power-Up Sequence as described in section IV.
2. Select the number of measurements to be obtained by accessing the configuration
menu as described in section V.
3. Position
the
Pachette 2
for easy visibility during patient examination.
4. With the patient in supine position and visualizing a fixation spot on the ceiling,
position the tip of the probe onto the cornea. Once the probe tip is aligned
properly, the
Pachette 2
will automatically begin to take a series of measurements.
If a measurement is not obtained within 3 seconds, a long “beep” will occur and
the display will indicate:
If the message of “POOR APPLANATION” keeps appearing, check to insure the
probe tip actually touches the cornea and is perpendicular to the corneal surface.
5. For each measurement that is obtained, a short “beep” will occur to indicate that
the measurement has been stored in memory. After all measurements have been
taken, a long “beep” will occur, the display will briefly indicate:
POOR
APPLANATION
All Meas Taken
Press
↑
/
↓
or CLR