Keratron™ Installation and operating manual
OPTIKON 2000
Cod. 161501EN
7-4
2014-04-23
Rev.0
Figure 7-6: Transcription of the calibration sphere diopter power
If the operator presses the [Start] key, the calibration proceeds through 6 steps: the
first 3 are the acquisition of the calibration sphere by means of the pair of
“Near”
photoelectric cells, and the subsequent 3 by means of the pair of “Far” photoelectric
cells (Ref. §5.1.2).
As these operations are identical, for the sake of brevity only one of the six steps will
be presented as an example.
When [Start] is pressed, the monitor will appear as shown in Figure 7-7: the screen
shows the live image from the video camera (1), and the relative position of the
photoelectric cells in relation to the corneal apex is shown by the arrows (3) and by
the figure (2). When the eye is in the correct position, the word
OK
in the middle in
(3) becomes red and the associated audible signal will assume a characteristic
rhythm and frequency. Then the operator can press the
joystick
and acquire the
image of the rings.
During all of the steps it is always possible to press the [Abort] button (4) and return
to the initial screen shown in Figure 7-1.
Figure 7-7: Screen during calibration
