12 Practical Guide for operating the C-Quant
Instruction Manual C-Quant ( G/80000/1007/en)
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Fig. 12-1: Eye position
Task during the test
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Only concentrate on the two half fields in the center of the field; ignore the flicker-
ing ring.
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Pay attention to flicker in the two half fields, decide which one flickers more clearly/
strongly, and press the corresponding button on the C-Quant (left button if the left
test field flickers stronger, right button if the right test field flickers stronger).
This procedure will be repeated for a series of stimulus presentations, until the test
is finished.
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React by first impression and react promptly.
Do not try to think about a presentation, but guess which side flickers more strongly.
The buttons can be pressed as soon as flicker appears, shortly after the beep.
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For several presentations, it will be hard to tell the difference between the two half
fields (they seem to be flickering equally strong).
This is normal, and also here you must make a choice following your first impulse.
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Optional information (only if the patients ask): one measurement consists of about
25 presentations and usually takes 1.5 to 2 minutes.
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Make sure the patient is seated comfortably and the measurement takes place in a
quiet environment with a minimum of background noise and other people around.
The measurement requires full attention from the patient.
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Start the measurement by clicking the [Start] button.
A "Start Examination" dialog appears where you can check if you entered the correct
"Eye" and "Correction" settings.
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This information must be correct, as it can not be altered afterwards.
The settings can be altered in the dialog box.
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Click the [OK] button to start the actual measurement.
During the measurement
If the patient is too hesitant to choose between the two half fields and/or refuses to press
a button, you can enter responses yourself with the arrow keys on the computer/laptop.
If you need to generate a random answer (in case the patient is undecisive with respect
to the left/right choice), it is best to always press the same key (e.g. the left arrow key).
Use this option cautiously.
