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USER MANUAL
RETEVET™ PORTABLE ERG
T +49 7461 96 580 0 | F +49 7461 96 580 90 | [email protected] | www.eickemeyer.com
Flicker Results on the Device Versus on a PC
Flicker results are presented as 2 curves. The black curve represents the electrical response of the retina to the fl ickering light
while the red dashed curve represents the fundamental (or best-fi tting sine wave) of the electrical response.
When viewing the fl icker results
on the device
, two periods are shown. The light fl ashes stimulating the retina occurred at
time = 0 ms and near time = 35 ms. Peak-to-peak amplitudes and timing measurements use the fundamental because this
measure has been reported to be more accurate for managing patients with ischemia (Severns, Johnson, and Merritt 1991)
and more robust to the lighting conditions the patient experienced before the test (McAnany and Nolan 2014). The dotted
lines indicate the measurement values extracted from the waveforms.
When viewing the results on the PC the PDF shows three periods. In the electrical response, the light fl ashes stimulating the
retina occurred at time = 0 ms, 35 ms and 70 ms. The PDF report shows the timing and peak-to-peak amplitude for the
electrical response as well as for the fundamental of the electrical response.
It is up to the investigator to choose one of the two ways of evaluating fl icker responses and sticking to it for consistency and
data comparability.
