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4.6.2
Video Frenzel
Video Frenzel is a basic test, which can record patient eye movement without any analytical assessments. There
is no time limit for eye recording in this test and there is no calibration requirement to perform this test.
4.6.3
Spontaneous Nystagmus
This is a vision-denied test and the patient will look straight ahead with the goggle cover on. The operator will be
able to watch the patient's eyes either from the computer screen or from the TV if installed. When the test is
started, the eye position graphs will be displayed. Slow phase of the nystagmus will be highlighted in green.
When significant nystagmus is detected, the average slow phase velocity (a.SPV) will be displayed in the bar
graph on the right side of the eye position recordings. When the test ends, the software will color-code the
nystagmus slow phase velocities in green.
4.6.4
Dix-Hallpike / Advanced Dix-Hallpike (optional)
This is a vision-denied test. The patient should be in the standard Dix-Hallpike body position, with their head
hanging beyond the chair frame/examination table edge and supported by the examiner. In the advanced
version of the test, the VORTEQ
and records torsion. The patient will look straight ahead with the goggle cover on in a vision-denied condition.
Lower the patient into the Dix-Hallpike position while supporting the head and the goggles in place. Use the RF
remote, foot pedal or side switch to start recording the eye movements. A double beep will sound when the test
is scheduled to raise the patient back up to a sitting position. Using the RF remote, foot pedal or side switch will
end the supine portion early and play the double beep and allow the operator to finish the test earlier if desired.
4.6.5
Dynamic Visual Acuity (optional)
This test does not require any goggle. The patient is required to be in sitting position. Attach the VORTEQ
(2
generation) or VORTEQ
nd
patient will establish his/her static acuity by correctly defining the C character without shaking the head. The test
will then proceed with testing each direction while the patient shakes his/her head to the sound of a metronome.
Have the patient smoothly shake his/her head side to side for horizontal testing or up and down for vertical
testing. If the test is performed with a wrong orientation of the VORTEQ
operator gets a warning message from the software.
4.6.6
vHIT for EyeSeeCam (optional)
Ensure that the patient is seated in an upright position with arm rest and low back rest. The test can be done with
the EyeSeeCam goggle with camera and built-in IMU. Ensure that the standard calibration and the head
calibration is done before starting the test. The operator can then proceed with the subtests (Lateral, LARP,
RALP and SHIMP). Please refer to 'Additional information' for more details.
4.6.7
Additional functions
During the test procedure, click or touch the Add Note button to add a comment during the test. The fixation light
inside the video goggles can be turned on and off using the Fixation Light button or using the Fixation button on
the RF remote. If the test needs to be restarted, press the ESC key on the RF remote or the escape key on the
keyboard.
D-0126472-A – 2020/08
VisualEyes™ 505 Instructions for Use -US
IMU should be attached to the goggles. It provides feedback on head position
TM
rate sensor (1
generation) to the DVA headband. Before starting the test, the
TM
st
rate sensor (1
generation), the
TM
st
IMU
TM
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