3. To begin data collection, click Start or click the left button on the presentation remote.
• Horizontal (HR) and vertical (VR) eye position traces display in the Eye Position Traces window. (The default dis-
play is set in Test Options.)
• The real time SPV (slow-phase velocity) value is an estimated value calculated according to the amount of vari-
ability around the SPV estimate. The value is displayed in either green or orange in the upper right area of the
window.
– Green: When the variability is low, there is a high probability that the value is reliable.
– Orange: When the variability is high, there is less probability that the value is reliable.
Note• SPV values displayed in orange should be considered less reliable but not inaccurate.
The real time SPV allows the tester to easily monitor the presence or absence of nystagmus. The tester will know when
the nystagmus has subsided and the patient can be moved into the next position.
Note• You can find more information in the ICS Impulse training video or at www.icsimpulse.com.
84 Otometrics - ICS Impulse USB
10 Positional
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