Topcon CA-200F, Instructions For Use Manual, Page: 24 / 62

CA-200F Corneal Analyser - Rev. 7 16/01/2012
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TOPOGRAPHY
Backlighting of the Placido disc is automatically activated when the acquisition environment is accessed. If
the analyser is not used for a few minutes, the cone turns off; to switch it on again, just push the button on
the joystick as indicated on the screen (
fig. 1-13
).
fig. 1-13
Acquisition procedure
Align the live image in the center and focus it, then push the joystick button to start acquisition. Move the
instrument forward and backward (following the indications of the red and blue arrows on the screen) to find
the best focus; the system will automatically capture the image. To manually acquire the image, push the
joystick button again; the software will in any case select the image with the best focus.
PUPILLOMETRY
Press the
“PUPI”
button to acquire the Pupillometry images (
fig. 1-14
).
You can select from the following types of acquisition:
Dynamic : acquisition of a sequence of images as the light conditions change from scotopic to
photopic and back to scotopic so that you can analyze pupil reaction times and contraction
Photopic
Mesopic
Scotopic